diff --git a/.gitignore b/.gitignore
index 4d4e37c..dd0d673 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 build/
 *.swp
 src/main.cc
+help/
+Testing/
+**/api_key.json
\ No newline at end of file
diff --git a/README.md b/README.md
index 41f443d..2a9132a 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ you can use these endpoint
 # Installation
 ## Ubuntu
 ```
-# apt install clang cmake git libboost-dev libboost-test-dev libcurl4-openssl-dev libssl-dev ninja-build
+# apt install clang cmake git libboost-dev libcurl4-openssl-dev libssl-dev ninja-build
 $ git clone https://github.com/koron0902/CocoaTweet
 $ cd CocoaTweet
 $ mkdir build
@@ -74,14 +74,14 @@ $ mingw32-make
 ### 1.Write Key into code
 write api key into code and create Key object use it.  
 ```
-#include "cocoatweet/oauth/key.h"
+#include "cocoatweet/authentication/key.h"
 
 auto consumerKey       = "your consumer key";
 auto consumerSecret    = "your consumer secret";
 auto accessToken       = "your access token";
 auto accessTokenSecret = "your access token secret";
 
-CocoaTweet::OAuth::Key key(consumerKey, consumerSecret, accessToken, accessTokenSecret);
+CocoaTweet::Authentication::Key key(consumerKey, consumerSecret, accessToken, accessTokenSecret);
 
 ```
 
@@ -99,9 +99,9 @@ prepare file which written 'api-key' with json format.
 
 then you can load api key from json file.  
 ```
-#include "cocoatweet/oauth/key.h"
+#include "cocoatweet/authentication/key.h"
 
-CocoaTweet::OAuth::Key key = CocoaTweet::OAuth::Key::fromJsonFile("api_key.json");
+CocoaTweet::Authentication::Key key = CocoaTweet::Authentication::Key::fromJsonFile("api_key.json");
 ```
 
 ## Generate API object
diff --git a/api_key.json b/api_key.json
index 37865c0..41b6fa8 100644
--- a/api_key.json
+++ b/api_key.json
@@ -1,6 +1,6 @@
 {
-    "consumer_key" : "HmXS3q4yrQ2wndiCQzH8YnUQM",
-    "consumer_secret" : "qZwdGJYGFMpz7CSVGPHmbrh0O3Sk99wa0OLMf8HSvKKtNclrnf",
-    "access_token" : "1427931990792146949-iuNX8xBgQSXGtxr5cz8m495OtnXKcw",
-    "access_token_secret" : "A0R7vOOR3pRm4trGLxVbwNiQTkOMAkEh3z5ed3IxJVbJl"
+    "consumer_key" : "wcSkGjuvoQ7gGjB0rR5XSJiWI",
+    "consumer_secret" : "Qo9fiQaimj7QwqB8dXOONVI9QL2quJyxh3ZXo2REgvcrpCC3gE",
+    "access_token" : "1427931990792146949-nmcoAzhLSq0j0vwv8ati9F5oQN3Gb7",
+    "access_token_secret" : "bzWd71ARfczBMuYLcsHdlXotdNVHY3nX7WMOSrLCuHXHa"
 }
diff --git a/src/cocoatweet/api/api.cc b/src/cocoatweet/api/api.cc
index fedaabf..9a5bdcb 100644
--- a/src/cocoatweet/api/api.cc
+++ b/src/cocoatweet/api/api.cc
@@ -1,18 +1,31 @@
 #include <cocoatweet/api/api.h>
+#include <cocoatweet/authentication/authenticate.h>
+
+#include <iostream>
 
 namespace CocoaTweet::API {
-API::API(CocoaTweet::OAuth::Key _key) {
-  oauth_         = std::make_shared<CocoaTweet::OAuth::OAuth1>(_key);
+API::API(CocoaTweet::Authentication::Key _key) {
+  swapKey(_key);
+
+}
+
+void API::swapKey(const CocoaTweet::Authentication::Key _key){
+  if(_key.authType() == CocoaTweet::Authentication::Key::OAUTH10A){
+      oauth_         = std::make_shared<CocoaTweet::Authentication::OAuth1>(_key);
+  }else{
+
+  }
   user_          = Users::User(oauth_);
   status_        = Statuses::Status(oauth_);
   favorite_      = Favorites::Favorite(oauth_);
   media_         = Medias::Media(oauth_);
   directMessage_ = DirectMessages::DirectMessage(oauth_);
+  oauth1_ = OAuth1::OAuth(oauth_);
 }
 
-const std::string& API::generateBearerToken() const {
-  return oauth_->generateBearerToken();
-}
+// const std::string& API::generateBearerToken() const {
+//   return oauth_->generateBearerToken();
+// }
 
 Users::User API::user() const {
   return user_;
@@ -33,4 +46,7 @@ Medias::Media API::media() const {
 DirectMessages::DirectMessage API::directMessage() const {
   return directMessage_;
 }
+OAuth1::OAuth API::oauth1() const {
+  return oauth1_;
+}
 } // namespace CocoaTweet::API
diff --git a/src/cocoatweet/api/api.h b/src/cocoatweet/api/api.h
index 4a41b4f..2a23787 100644
--- a/src/cocoatweet/api/api.h
+++ b/src/cocoatweet/api/api.h
@@ -6,15 +6,16 @@
 #include <cocoatweet/api/favorite/favorite.h>
 #include <cocoatweet/api/media/media.h>
 #include <cocoatweet/api/directMessage/directMessage.h>
-#include <cocoatweet/oauth/oauth.h>
+#include <cocoatweet/authentication/authenticator.h>
+#include <cocoatweet/api/oauth1/oauth.h>
 
 namespace CocoaTweet::API {
 /// @brief Twitter API Entry Point
 class API {
 public:
   /// @brief primary constructor
-  /// @param[in] _key Twitter API Key typed CocoaTweet::OAuth::Key
-  API(CocoaTweet::OAuth::Key _key);
+  /// @param[in] _key Twitter API Key typed CocoaTweet::Authentication::Key
+  API(CocoaTweet::Authentication::Key _key);
 
   Users::User user() const;
 
@@ -29,7 +30,11 @@ public:
   Medias::Media media() const;
 
   DirectMessages::DirectMessage directMessage() const;
+
+  OAuth1::OAuth oauth1() const;
+
   const std::string& generateBearerToken() const;
+  void swapKey(const CocoaTweet::Authentication::Key _key);
 
 private:
   Users::User user_;
@@ -37,7 +42,8 @@ private:
   Favorites::Favorite favorite_;
   Medias::Media media_;
   DirectMessages::DirectMessage directMessage_;
-  std::shared_ptr<CocoaTweet::OAuth::OAuth1> oauth_;
+  OAuth1::OAuth oauth1_;
+  std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> oauth_;
 };
 } // namespace CocoaTweet::API
 
diff --git a/src/cocoatweet/api/directMessage/directMessage.cc b/src/cocoatweet/api/directMessage/directMessage.cc
index 4788418..18c7c7a 100644
--- a/src/cocoatweet/api/directMessage/directMessage.cc
+++ b/src/cocoatweet/api/directMessage/directMessage.cc
@@ -2,7 +2,7 @@
 #include <cocoatweet/api/directMessage/new.h>
 
 namespace CocoaTweet::API::DirectMessages {
-DirectMessage::DirectMessage(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+DirectMessage::DirectMessage(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   oauth_ = _oauth;
 }
 
diff --git a/src/cocoatweet/api/directMessage/directMessage.h b/src/cocoatweet/api/directMessage/directMessage.h
index d796111..d4b2044 100644
--- a/src/cocoatweet/api/directMessage/directMessage.h
+++ b/src/cocoatweet/api/directMessage/directMessage.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_DIRECTMESSAGE_DIRECTMESSAGE_H_
 
 #include "cocoatweet/api/interface/groupInterface.h"
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/model/tweet.h>
 #include <vector>
 #include <utility>
@@ -15,8 +15,8 @@ public:
   DirectMessage() = default;
 
   /// @brief   constructor which finally should to be called.
-  /// @param[in] std::shared_ptr<CocoaTweet::OAuth::OAuth1> : pointer to OAuth object
-  DirectMessage(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  /// @param[in] std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> : pointer to OAuth object
+  DirectMessage(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
   void messageCreate(const std::string& _recipient, const std::string& _message);
 
diff --git a/src/cocoatweet/api/directMessage/new.cc b/src/cocoatweet/api/directMessage/new.cc
index 7cbbbec..04cecde 100644
--- a/src/cocoatweet/api/directMessage/new.cc
+++ b/src/cocoatweet/api/directMessage/new.cc
@@ -23,7 +23,7 @@ void New::message(const std::string& _message) {
   json_["event"]["message_create"]["message_data"]["text"] = _message;
 }
 
-void New::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+void New::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   bodyParam_.insert_or_assign("data", json_.dump());
   HttpPost::process(_oauth, [](const std::string& _rcv) {});
 }
diff --git a/src/cocoatweet/api/directMessage/new.h b/src/cocoatweet/api/directMessage/new.h
index e717e9a..b620330 100644
--- a/src/cocoatweet/api/directMessage/new.h
+++ b/src/cocoatweet/api/directMessage/new.h
@@ -17,9 +17,9 @@ public:
   void message(const std::string& _message);
 
   /// @brief process request for endpoint
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to oauth object
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to oauth object
   /// @param[out] CocoaTweet::API::Model::Tweet : request result
-  void process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  void process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
   std::string status_;
diff --git a/src/cocoatweet/api/favorite/create.cc b/src/cocoatweet/api/favorite/create.cc
index 74a4358..cf27dcc 100644
--- a/src/cocoatweet/api/favorite/create.cc
+++ b/src/cocoatweet/api/favorite/create.cc
@@ -11,7 +11,7 @@ void Create::id(const std::string& _id) {
   bodyParam_.insert_or_assign("id", _id);
 }
 
-CocoaTweet::API::Model::Tweet Create::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+CocoaTweet::API::Model::Tweet Create::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet(_rcv);
diff --git a/src/cocoatweet/api/favorite/create.h b/src/cocoatweet/api/favorite/create.h
index 58e6c88..d8bf406 100644
--- a/src/cocoatweet/api/favorite/create.h
+++ b/src/cocoatweet/api/favorite/create.h
@@ -9,7 +9,7 @@ class Create : public CocoaTweet::API::Interface::HttpPost {
 public:
   Create();
   void id(const std::string& _id);
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
 };
diff --git a/src/cocoatweet/api/favorite/destroy.cc b/src/cocoatweet/api/favorite/destroy.cc
index ef88c9a..26143cc 100644
--- a/src/cocoatweet/api/favorite/destroy.cc
+++ b/src/cocoatweet/api/favorite/destroy.cc
@@ -12,7 +12,7 @@ void Destroy::id(const std::string& _id) {
 }
 
 CocoaTweet::API::Model::Tweet Destroy::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet(_rcv);
diff --git a/src/cocoatweet/api/favorite/destroy.h b/src/cocoatweet/api/favorite/destroy.h
index 5515375..7e669bf 100644
--- a/src/cocoatweet/api/favorite/destroy.h
+++ b/src/cocoatweet/api/favorite/destroy.h
@@ -9,7 +9,7 @@ class Destroy : public CocoaTweet::API::Interface::HttpPost {
 public:
   Destroy();
   void id(const std::string& _id);
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
 };
diff --git a/src/cocoatweet/api/favorite/favorite.cc b/src/cocoatweet/api/favorite/favorite.cc
index 37da144..9b9aceb 100644
--- a/src/cocoatweet/api/favorite/favorite.cc
+++ b/src/cocoatweet/api/favorite/favorite.cc
@@ -3,7 +3,7 @@
 #include "cocoatweet/api/favorite/destroy.h"
 
 namespace CocoaTweet::API::Favorites {
-Favorite::Favorite(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+Favorite::Favorite(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   oauth_ = _oauth;
 }
 
diff --git a/src/cocoatweet/api/favorite/favorite.h b/src/cocoatweet/api/favorite/favorite.h
index 92355c2..6b32d29 100644
--- a/src/cocoatweet/api/favorite/favorite.h
+++ b/src/cocoatweet/api/favorite/favorite.h
@@ -2,14 +2,14 @@
 #define COCOATWEET_API_FAVORITE_FAVORITE_H_
 
 #include "cocoatweet/api/interface/groupInterface.h"
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/model/tweet.h>
 
 namespace CocoaTweet::API::Favorites {
 class Favorite : public groupInterface {
 public:
   Favorite() = default;
-  Favorite(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  Favorite(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
   CocoaTweet::API::Model::Tweet create(const std::string& _id) const;
   CocoaTweet::API::Model::Tweet destroy(const std::string& _id) const;
 };
diff --git a/src/cocoatweet/api/interface/groupInterface.h b/src/cocoatweet/api/interface/groupInterface.h
index 64866fa..609c223 100644
--- a/src/cocoatweet/api/interface/groupInterface.h
+++ b/src/cocoatweet/api/interface/groupInterface.h
@@ -2,12 +2,12 @@
 #define COCOATWEET_API_INTERFACE_GROUPINTERFACE_H_
 
 #include <memory>
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 
 namespace CocoaTweet::API {
 class groupInterface {
 protected:
-  std::weak_ptr<CocoaTweet::OAuth::OAuth1> oauth_;
+  std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> oauth_;
 };
 } // namespace CocoaTweet::API
 
diff --git a/src/cocoatweet/api/interface/httpBase.h b/src/cocoatweet/api/interface/httpBase.h
index e6314a3..1be4bf8 100644
--- a/src/cocoatweet/api/interface/httpBase.h
+++ b/src/cocoatweet/api/interface/httpBase.h
@@ -2,17 +2,18 @@
 #define COCOATWEET_API_INTERFACE_HTTPBASE_H_
 
 #include <functional>
-#include "cocoatweet/oauth/oauth.h"
+#include <memory>
+#include "cocoatweet/authentication/authenticator.h"
 
 namespace CocoaTweet::API::Interface {
 class HttpBase {
 public:
 protected:
-  std::weak_ptr<CocoaTweet::OAuth::OAuth1> oauth_;
+  std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> oauth_;
   std::map<std::string, std::string> bodyParam_;
   std::string url_;
   std::string contentType_;
-  virtual void process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
+  virtual void process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth,
                        std::function<void(const std::string&)> _callback) = 0;
   static size_t curlCallback_(char* _ptr, size_t _size, size_t _nmemb, std::string* _stream) {
     int realsize = _size * _nmemb;
diff --git a/src/cocoatweet/api/interface/httpGet.cc b/src/cocoatweet/api/interface/httpGet.cc
index af5b43e..bdab573 100644
--- a/src/cocoatweet/api/interface/httpGet.cc
+++ b/src/cocoatweet/api/interface/httpGet.cc
@@ -21,7 +21,7 @@ extern "C" {
 #endif
 
 namespace CocoaTweet::API::Interface {
-void HttpGet::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
+void HttpGet::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth,
                       std::function<void(const std::string&)> _callback) {
   auto url = url_;
 
diff --git a/src/cocoatweet/api/interface/httpGet.h b/src/cocoatweet/api/interface/httpGet.h
index bf98421..68f3d47 100644
--- a/src/cocoatweet/api/interface/httpGet.h
+++ b/src/cocoatweet/api/interface/httpGet.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_INTERFACE_HTTPGET_H_
 
 #include <functional>
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/interface/httpBase.h>
 
 namespace CocoaTweet::API::Interface {
@@ -11,11 +11,11 @@ class HttpGet : public virtual HttpBase {
 public:
 protected:
   /// @brief Send HTTP/POST using OAuth object
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to OAuth object to
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to OAuth object to
   /// authenticate
   /// @param[in] std::function<void(const unsigned int, const std::string&)> _callback :
   /// callback method for processing to response
-  void process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
+  void process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth,
                std::function<void(const std::string&)> _callback);
 };
 } // namespace CocoaTweet::API::Interface
diff --git a/src/cocoatweet/api/interface/httpPost.cc b/src/cocoatweet/api/interface/httpPost.cc
index 84f20dc..3d2a36e 100644
--- a/src/cocoatweet/api/interface/httpPost.cc
+++ b/src/cocoatweet/api/interface/httpPost.cc
@@ -21,22 +21,22 @@ extern "C" {
 #endif
 
 namespace CocoaTweet::API::Interface {
-void HttpPost::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
+void HttpPost::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth,
                        std::function<void(const std::string&)> _callback) {
   // エンドポイントへのパラメータにOAuthパラメータを付加して署名作成
   auto oauth       = _oauth.lock();
-  auto oauthParam  = oauth->oauthParam();
-  auto sigingParam = oauthParam;
-  if (contentType_ == "application/x-www-form-urlencoded") {
-    for (const auto [k, v] : bodyParam_) {
-      sigingParam.insert_or_assign(k, v);
-    }
-  }
+  // auto oauthParam  = oauth->oauthParam();
+  // auto sigingParam = oauthParam;
+  // if (contentType_ == "application/x-www-form-urlencoded") {
+  //   for (const auto [k, v] : bodyParam_) {
+  //     sigingParam.insert_or_assign(k, v);
+  //   }
+  // }
 
-  auto signature = oauth->signature(sigingParam, "POST", url_);
+  // auto signature = oauth->signature(sigingParam, "POST", url_);
 
   // 作成した署名をエンドポイントへのパラメータ及びOAuthパラメータに登録
-  oauthParam.merge(signature);
+  // oauthParam.merge(signature);
 
   // リクエストボディの構築
   std::string requestBody = "";
@@ -60,13 +60,21 @@ void HttpPost::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
   }
 
   // ヘッダの構築
-  std::string oauthHeader = "authorization: OAuth ";
-  {
-    std::vector<std::string> tmp;
-    for (const auto& [key, value] : oauthParam) {
-      tmp.push_back(key + "=" + CocoaTweet::Util::urlEncode(value));
-    }
-    oauthHeader += CocoaTweet::Util::join(tmp, ",");
+  // std::string oauthHeader = "authorization: OAuth ";
+  // {
+  //   std::vector<std::string> tmp;
+  //   for (const auto& [key, value] : oauthParam) {
+  //     tmp.push_back(key + "=" + CocoaTweet::Util::urlEncode(value));
+  //   }
+  //   oauthHeader += CocoaTweet::Util::join(tmp, ",");
+  // }
+
+
+  auto oauthHeader = std::string();
+  if (contentType_ == "application/x-www-form-urlencoded") {
+    oauthHeader = oauth->calculateAuthHeader(bodyParam_, "POST", url_);
+  } else {
+    oauthHeader = oauth->calculateAuthHeader({}, "POST", url_);
   }
 
   // do post
diff --git a/src/cocoatweet/api/interface/httpPost.h b/src/cocoatweet/api/interface/httpPost.h
index 441fe58..d307984 100644
--- a/src/cocoatweet/api/interface/httpPost.h
+++ b/src/cocoatweet/api/interface/httpPost.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_INTERFACE_HTTPPOST_H_
 
 #include <functional>
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/interface/httpBase.h>
 
 namespace CocoaTweet::API::Interface {
@@ -11,11 +11,11 @@ class HttpPost : public HttpBase {
 public:
 protected:
   /// @brief Send HTTP/POST using OAuth object
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to OAuth object to
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to OAuth object to
   /// authenticate
   /// @param[in] std::function<void(const unsigned int, const std::string&)> _callback :
   /// callback method for processing to response
-  void process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth,
+  void process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth,
                std::function<void(const std::string&)> _callback);
 };
 } // namespace CocoaTweet::API::Interface
diff --git a/src/cocoatweet/api/media/media.cc b/src/cocoatweet/api/media/media.cc
index 6414edf..f41d097 100644
--- a/src/cocoatweet/api/media/media.cc
+++ b/src/cocoatweet/api/media/media.cc
@@ -1,7 +1,7 @@
 #include "cocoatweet/api/media/media.h"
 
 namespace CocoaTweet::API::Medias {
-Media::Media(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+Media::Media(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   oauth_ = _oauth;
 }
 
diff --git a/src/cocoatweet/api/media/media.h b/src/cocoatweet/api/media/media.h
index d435c78..9df9927 100644
--- a/src/cocoatweet/api/media/media.h
+++ b/src/cocoatweet/api/media/media.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_MEDIA_MEDIA_H_
 
 #include "cocoatweet/api/interface/groupInterface.h"
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/model/mediaStore.h>
 #include <cocoatweet/api/media/upload.h>
 #include <vector>
@@ -16,8 +16,8 @@ public:
   Media() = default;
 
   /// @brief   constructor which finally should to be called.
-  /// @param[in] std::shared_ptr<CocoaTweet::OAuth::OAuth1> : pointer to OAuth object
-  Media(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  /// @param[in] std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> : pointer to OAuth object
+  Media(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
   CocoaTweet::API::Model::MediaStore upload(const std::string& _file) const;
 
diff --git a/src/cocoatweet/api/media/upload.cc b/src/cocoatweet/api/media/upload.cc
index 16c3019..5348cb0 100644
--- a/src/cocoatweet/api/media/upload.cc
+++ b/src/cocoatweet/api/media/upload.cc
@@ -19,7 +19,7 @@ void Upload::media(const std::string& _media) {
 void Upload::mediaId(const std::string& _mediaId) {}
 
 CocoaTweet::API::Model::MediaStore Upload::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   auto extension = std::filesystem::path(media_).extension().string<char>();
   if (mimeType.count(extension) == 0) {
     throw new CocoaTweet::Exception::UnsupportedMediaTypeException(
diff --git a/src/cocoatweet/api/media/upload.h b/src/cocoatweet/api/media/upload.h
index a021855..5355207 100644
--- a/src/cocoatweet/api/media/upload.h
+++ b/src/cocoatweet/api/media/upload.h
@@ -26,11 +26,11 @@ public:
   void mediaId(const std::string& _mediaId);
 
   /// @brief upload media
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to OAuth object for
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to OAuth object for
   /// authenticate
   /// @param[out] CocoaTweet::API::Model::MediaStore : media upload result. use id() for post
   /// tweet.
-  CocoaTweet::API::Model::MediaStore process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::MediaStore process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 };
 } // namespace CocoaTweet::API::Medias
 
diff --git a/src/cocoatweet/api/model/oauthToken.cc b/src/cocoatweet/api/model/oauthToken.cc
new file mode 100644
index 0000000..7933473
--- /dev/null
+++ b/src/cocoatweet/api/model/oauthToken.cc
@@ -0,0 +1,19 @@
+#include "oauthToken.h"
+
+namespace CocoaTweet::API::Model{
+
+        OAuthToken::OAuthToken(): oauthToken_(""), oauthTokenSecret_(""){}
+        OAuthToken::OAuthToken(const std::string _oauthToken, const std::string& _oauthTokenSecret): oauthToken_(_oauthToken), oauthTokenSecret_(_oauthTokenSecret) {}
+        const std::string& OAuthToken::oauthToken() const {
+            return oauthToken_;
+        }
+        const std::string& OAuthToken::oauthTokenSecret() const{
+            return oauthTokenSecret_;
+        }
+        void OAuthToken::oauthToken(const std::string& _oauthToken) {
+            oauthToken_ = _oauthToken;
+        }
+        void OAuthToken::oauthTokenSecret(const std::string& _oauthTokenSecret){
+            oauthTokenSecret_ = _oauthTokenSecret;
+        }
+}
\ No newline at end of file
diff --git a/src/cocoatweet/api/model/oauthToken.h b/src/cocoatweet/api/model/oauthToken.h
new file mode 100644
index 0000000..38a2d2f
--- /dev/null
+++ b/src/cocoatweet/api/model/oauthToken.h
@@ -0,0 +1,20 @@
+#ifndef COCOATWEET_API_MODEL_OAUTHTOKEN_H_
+#define COCOATWEET_API_MODEL_OAUTHTOKEN_H_
+#include<string>
+
+namespace CocoaTweet::API::Model{
+    class OAuthToken{
+        std::string oauthToken_;
+        std::string oauthTokenSecret_;
+
+    public:
+        OAuthToken();
+        OAuthToken(const std::string _oauthToken, const std::string& _oauthTokenSecret);
+        const std::string& oauthToken() const;
+        const std::string& oauthTokenSecret() const; 
+        void oauthToken(const std::string& _oauthToken);
+        void oauthTokenSecret(const std::string& _oauthTokenSecret);
+    };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/cocoatweet/api/oauth1/accessToken.cc b/src/cocoatweet/api/oauth1/accessToken.cc
new file mode 100644
index 0000000..82b85d0
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/accessToken.cc
@@ -0,0 +1,33 @@
+#include <cocoatweet/api/oauth1/accessToken.h>
+#include <cocoatweet/util/util.h>
+#include <iostream>
+
+namespace CocoaTweet::API::OAuth1{
+    AccessToken::AccessToken(){
+        contentType_ = "application/x-www-form-urlencoded";
+        url_         = "https://api.twitter.com/oauth/access_token";
+    }
+
+    void AccessToken::oauthVerifier(const std::string& _verifier){
+        bodyParam_.insert_or_assign("oauth_verifier", _verifier);
+    }
+
+    void AccessToken::oauthToken(const CocoaTweet::API::Model::OAuthToken _token){
+        oauthToken_ = _token;
+    }
+
+    const CocoaTweet::API::Model::OAuthToken AccessToken::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth){
+        CocoaTweet::API::Model::OAuthToken oauthToken;
+        HttpPost::process(_oauth, [&oauthToken](const std::string& _rcv){
+            auto mp = CocoaTweet::Util::parse(_rcv, '&', '=');
+            if(mp.count("oauth_token")){
+                oauthToken.oauthToken(mp.at("oauth_token"));
+            }
+            if(mp.count("oauth_token_secret")){
+                oauthToken.oauthTokenSecret(mp.at("oauth_token_secret"));
+            }
+            std::cout << _rcv << std::endl;
+        });
+        return oauthToken;
+    }
+}
\ No newline at end of file
diff --git a/src/cocoatweet/api/oauth1/accessToken.h b/src/cocoatweet/api/oauth1/accessToken.h
new file mode 100644
index 0000000..3c0ef09
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/accessToken.h
@@ -0,0 +1,20 @@
+#ifndef COCOATWEET_API_OAUTH1_ACCESSTOKEN_H
+#define COCOATWEET_API_OAUTH1_ACCESSTOKEN_H
+
+#include <cocoatweet/api/interface/httpPost.h>
+#include <cocoatweet/api/model/oauthToken.h>
+namespace CocoaTweet::API::OAuth1{
+    class AccessToken: public CocoaTweet::API::Interface::HttpPost {
+private:
+    CocoaTweet::API::Model::OAuthToken oauthToken_;
+public:
+    AccessToken();
+
+    void oauthVerifier(const std::string& _verifier);
+    void oauthToken(const CocoaTweet::API::Model::OAuthToken _token);
+
+    const CocoaTweet::API::Model::OAuthToken process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) ;
+    };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/cocoatweet/oauth/authorize.cc b/src/cocoatweet/api/oauth1/authenticate.cc
similarity index 100%
rename from src/cocoatweet/oauth/authorize.cc
rename to src/cocoatweet/api/oauth1/authenticate.cc
diff --git a/src/cocoatweet/oauth/oauth2/invalidateToken.cc b/src/cocoatweet/api/oauth1/authenticate.h
similarity index 100%
rename from src/cocoatweet/oauth/oauth2/invalidateToken.cc
rename to src/cocoatweet/api/oauth1/authenticate.h
diff --git a/src/cocoatweet/api/oauth1/authorize.cc b/src/cocoatweet/api/oauth1/authorize.cc
new file mode 100644
index 0000000..0cd7093
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/authorize.cc
@@ -0,0 +1,33 @@
+#include <string>
+#include <cocoatweet/api/oauth1/authorize.h>
+#include <iostream>
+#include <cocoatweet/util/util.h>
+
+namespace CocoaTweet::API::OAuth1{
+    Authorize::Authorize(){
+        contentType_ = "application/x-www-form-urlencoded";
+        url_         = "https://api.twitter.com/oauth/authorize";
+    }
+
+    void Authorize::oauthToken(const std::string& _oauthToken){
+        bodyParam_.insert_or_assign("oauth_token", _oauthToken);
+    }
+
+    void Authorize::forceLogin(const bool _forceLogin){
+        bodyParam_.insert_or_assign("force_login", std::to_string(static_cast<int>(_forceLogin)));
+    }
+
+    void Authorize::screenName(const std::string& _screenName){
+        bodyParam_.insert_or_assign("screen_name", _screenName);
+    }
+
+    const std::string Authorize::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> __unused__) {
+      std::vector<std::string> tmp;
+      std::string query = "";
+      for (const auto& [key, value] : bodyParam_) {
+        tmp.push_back(key + "=" + value);
+        query = CocoaTweet::Util::join(tmp, "&");
+      }
+      return url_ + "?" + query;;
+    }
+}
\ No newline at end of file
diff --git a/src/cocoatweet/api/oauth1/authorize.h b/src/cocoatweet/api/oauth1/authorize.h
new file mode 100644
index 0000000..c79116d
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/authorize.h
@@ -0,0 +1,20 @@
+#ifndef COCOATWEET_API_OAUTH1_AUTHORIZE_H
+#define COCOATWEET_API_OAUTH1_AUTHORIZE_H
+
+#include <cocoatweet/api/interface/httpPost.h>
+namespace CocoaTweet::API::OAuth1{
+    class Authorize: public CocoaTweet::API::Interface::HttpPost {
+public:
+    Authorize();
+
+    void oauthToken(const std::string& _oauthToken);
+
+    void forceLogin(const bool _forceLogin);
+
+    void screenName(const std::string& _screenName);
+
+    const std::string process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> __unused__) ;
+    };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/cocoatweet/oauth/oauth2/invalidateToken.h b/src/cocoatweet/api/oauth1/invalidateToken.cc
similarity index 100%
rename from src/cocoatweet/oauth/oauth2/invalidateToken.h
rename to src/cocoatweet/api/oauth1/invalidateToken.cc
diff --git a/src/cocoatweet/oauth/oauth2/token.cc b/src/cocoatweet/api/oauth1/invalidateToken.h
similarity index 100%
rename from src/cocoatweet/oauth/oauth2/token.cc
rename to src/cocoatweet/api/oauth1/invalidateToken.h
diff --git a/src/cocoatweet/api/oauth1/oauth.cc b/src/cocoatweet/api/oauth1/oauth.cc
new file mode 100644
index 0000000..71e7636
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/oauth.cc
@@ -0,0 +1,35 @@
+#include <cocoatweet/api/oauth1/oauth.h>
+#include <cocoatweet/authentication/authenticate.h>
+
+namespace CocoaTweet::API::OAuth1 {
+  OAuth::OAuth(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth){
+      oauth_ = _oauth;
+  }
+
+  CocoaTweet::API::Model::OAuthToken OAuth::requestToken(const std::string& _oauthCallback) const{
+      auto key = oauth_.lock()->key();
+      key.authType(CocoaTweet::Authentication::Key::AUTH_TYPE::OAUTH10A);
+      auto oauth = std::make_shared<CocoaTweet::Authentication::OAuth1>(key);
+
+      CocoaTweet::API::OAuth1::RequestToken requestToken;
+      requestToken.oauthCallback(_oauthCallback);
+      return requestToken.process(oauth);
+  }
+
+  const std::string OAuth::authorize(const CocoaTweet::API::Model::OAuthToken _oauthToken) const{
+      CocoaTweet::API::OAuth1::Authorize authorize;
+      authorize.oauthToken(_oauthToken.oauthToken());
+      return authorize.process(oauth_);
+  }
+
+  const CocoaTweet::API::Model::OAuthToken OAuth::accessToken(const CocoaTweet::API::Model::OAuthToken _oauthToken, const std::string _verifier) const{
+      auto key = oauth_.lock()->key();
+      key.authType(CocoaTweet::Authentication::Key::AUTH_TYPE::OAUTH10A);
+      key.accessToken(_oauthToken.oauthToken());
+      key.accessTokenSecret(_oauthToken.oauthTokenSecret());
+      auto oauth = std::make_shared<CocoaTweet::Authentication::OAuth1>(key);
+      CocoaTweet::API::OAuth1::AccessToken accessToken;
+      accessToken.oauthVerifier(_verifier);
+      return accessToken.process(oauth);
+  }
+} // namespace CocoaTweet::API::Statuses
diff --git a/src/cocoatweet/api/oauth1/oauth.h b/src/cocoatweet/api/oauth1/oauth.h
new file mode 100644
index 0000000..1cb2439
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/oauth.h
@@ -0,0 +1,30 @@
+#ifndef COCOATWEET_API_OAUTH1_OAUTH_H_
+#define COCOATWEET_API_OAUTH1_OAUTH_H_
+
+#include "cocoatweet/api/interface/groupInterface.h"
+#include <cocoatweet/api/oauth1/accessToken.h>
+#include <cocoatweet/api/oauth1/requestToken.h>
+#include <cocoatweet/api/oauth1/authorize.h>
+#include <cocoatweet/api/model/oauthToken.h>
+#include <vector>
+#include <utility>
+
+namespace CocoaTweet::API::OAuth1 {
+/// @brief class for using users/show endpoint
+class OAuth : public groupInterface {
+public:
+  /// @brief primary constructor
+  OAuth() = default;
+  
+  /// @brief   constructor which finally should to be called.
+  /// @param[in] std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> : pointer to OAuth object
+  OAuth(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
+
+  CocoaTweet::API::Model::OAuthToken requestToken(const std::string& _oauthCallback) const;
+  const std::string authorize(const CocoaTweet::API::Model::OAuthToken _oauthToken) const;
+  const CocoaTweet::API::Model::OAuthToken accessToken(const CocoaTweet::API::Model::OAuthToken _oauthToken, const std::string _verifier) const;
+
+};
+} // namespace CocoaTweet::API::Statuses
+
+#endif
diff --git a/src/cocoatweet/api/oauth1/requestToken.cc b/src/cocoatweet/api/oauth1/requestToken.cc
new file mode 100644
index 0000000..95c6128
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/requestToken.cc
@@ -0,0 +1,29 @@
+#include <cocoatweet/api/oauth1/requestToken.h>
+#include <cocoatweet/util/util.h>
+#include <iostream>
+
+namespace CocoaTweet::API::OAuth1{
+    RequestToken::RequestToken(){
+        contentType_ = "application/x-www-form-urlencoded";
+        url_         = "https://api.twitter.com/oauth/request_token";
+    }
+
+    void RequestToken::oauthCallback(const std::string& _oauthCallback){
+        bodyParam_.insert_or_assign("oauth_callback", _oauthCallback);
+    }
+
+    CocoaTweet::API::Model::OAuthToken RequestToken::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth){
+        CocoaTweet::API::Model::OAuthToken oauthToken;
+        HttpPost::process(_oauth, [&oauthToken](const std::string& _rcv){
+            auto mp = CocoaTweet::Util::parse(_rcv, '&', '=');
+            if(mp.count("oauth_token")){
+                oauthToken.oauthToken(mp.at("oauth_token"));
+            }
+            if(mp.count("oauth_token_secret")){
+                oauthToken.oauthTokenSecret(mp.at("oauth_token_secret"));
+            }
+            std::cout << _rcv << std::endl;
+        });
+        return oauthToken;
+    }
+}
\ No newline at end of file
diff --git a/src/cocoatweet/api/oauth1/requestToken.h b/src/cocoatweet/api/oauth1/requestToken.h
new file mode 100644
index 0000000..32e4d6e
--- /dev/null
+++ b/src/cocoatweet/api/oauth1/requestToken.h
@@ -0,0 +1,17 @@
+#ifndef COCOATWEET_API_OAUTH1_REQUESTTOKEN_H
+#define COCOATWEET_API_OAUTH1_REQUESTTOKEN_H
+
+#include <cocoatweet/api/interface/httpPost.h>
+#include <cocoatweet/api/model/oauthToken.h>
+
+namespace CocoaTweet::API::OAuth1{
+    class RequestToken: public CocoaTweet::API::Interface::HttpPost {
+        public:
+        RequestToken();
+    void oauthCallback(const std::string& _oauthCallback);
+
+    CocoaTweet::API::Model::OAuthToken process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
+    };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/cocoatweet/oauth/oauth2/token.h b/src/cocoatweet/api/oauth2/invalidateToken.cc
similarity index 100%
rename from src/cocoatweet/oauth/oauth2/token.h
rename to src/cocoatweet/api/oauth2/invalidateToken.cc
diff --git a/src/cocoatweet/api/oauth2/invalidateToken.h b/src/cocoatweet/api/oauth2/invalidateToken.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/api/oauth2/oauth2.cc b/src/cocoatweet/api/oauth2/oauth2.cc
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/api/oauth2/oauth2.h b/src/cocoatweet/api/oauth2/oauth2.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/api/oauth2/token.cc b/src/cocoatweet/api/oauth2/token.cc
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/api/oauth2/token.h b/src/cocoatweet/api/oauth2/token.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/api/status/destroy.cc b/src/cocoatweet/api/status/destroy.cc
index caa0860..974b965 100644
--- a/src/cocoatweet/api/status/destroy.cc
+++ b/src/cocoatweet/api/status/destroy.cc
@@ -9,7 +9,7 @@ void Destroy::id(const std::string _id) {
 }
 
 CocoaTweet::API::Model::Tweet Destroy::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet::parse(_rcv);
diff --git a/src/cocoatweet/api/status/destroy.h b/src/cocoatweet/api/status/destroy.h
index 6e2a036..449b956 100644
--- a/src/cocoatweet/api/status/destroy.h
+++ b/src/cocoatweet/api/status/destroy.h
@@ -18,9 +18,9 @@ public:
   void id(const std::string _id);
 
   /// @brief process request for endpoint
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to oauth object
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to oauth object
   /// @param[out] CocoaTweet::API::Model::Tweet : request result
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 };
 } // namespace CocoaTweet::API::Statuses
 
diff --git a/src/cocoatweet/api/status/retweet.cc b/src/cocoatweet/api/status/retweet.cc
index 32d34b5..28b91d3 100644
--- a/src/cocoatweet/api/status/retweet.cc
+++ b/src/cocoatweet/api/status/retweet.cc
@@ -9,7 +9,7 @@ void Retweet::id(const std::string& _id) {
 }
 
 CocoaTweet::API::Model::Tweet Retweet::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet(_rcv);
diff --git a/src/cocoatweet/api/status/retweet.h b/src/cocoatweet/api/status/retweet.h
index add7a97..392812f 100644
--- a/src/cocoatweet/api/status/retweet.h
+++ b/src/cocoatweet/api/status/retweet.h
@@ -11,7 +11,7 @@ public:
 
   void id(const std::string& _id);
 
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 };
 } // namespace CocoaTweet::API::Statuses
 
diff --git a/src/cocoatweet/api/status/status.cc b/src/cocoatweet/api/status/status.cc
index 7e050aa..9f50d85 100644
--- a/src/cocoatweet/api/status/status.cc
+++ b/src/cocoatweet/api/status/status.cc
@@ -6,7 +6,7 @@
 #include "cocoatweet/api/status/userTimeline.h"
 
 namespace CocoaTweet::API::Statuses {
-Status::Status(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+Status::Status(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   oauth_ = _oauth;
 }
 
diff --git a/src/cocoatweet/api/status/status.h b/src/cocoatweet/api/status/status.h
index 74e4bb7..e2b8d06 100644
--- a/src/cocoatweet/api/status/status.h
+++ b/src/cocoatweet/api/status/status.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_STATUS_STATUS_H_
 
 #include "cocoatweet/api/interface/groupInterface.h"
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/model/tweet.h>
 #include <vector>
 #include <utility>
@@ -28,8 +28,8 @@ public:
   Status() = default;
 
   /// @brief   constructor which finally should to be called.
-  /// @param[in] std::shared_ptr<CocoaTweet::OAuth::OAuth1> : pointer to OAuth object
-  Status(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  /// @param[in] std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> : pointer to OAuth object
+  Status(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
   /// @brief send request to statuses/update with specified status
   /// @details this function throws CocoaTweet::Exception::* if something happen
diff --git a/src/cocoatweet/api/status/unretweet.cc b/src/cocoatweet/api/status/unretweet.cc
index 3d59158..3674591 100644
--- a/src/cocoatweet/api/status/unretweet.cc
+++ b/src/cocoatweet/api/status/unretweet.cc
@@ -9,7 +9,7 @@ void Unretweet::id(const std::string& _id) {
 }
 
 CocoaTweet::API::Model::Tweet Unretweet::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet(_rcv);
diff --git a/src/cocoatweet/api/status/unretweet.h b/src/cocoatweet/api/status/unretweet.h
index 4f2421f..b095929 100644
--- a/src/cocoatweet/api/status/unretweet.h
+++ b/src/cocoatweet/api/status/unretweet.h
@@ -11,7 +11,7 @@ public:
 
   void id(const std::string& _id);
 
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 };
 } // namespace CocoaTweet::API::Statuses
 
diff --git a/src/cocoatweet/api/status/update.cc b/src/cocoatweet/api/status/update.cc
index 866ad8b..a37fbc2 100644
--- a/src/cocoatweet/api/status/update.cc
+++ b/src/cocoatweet/api/status/update.cc
@@ -53,7 +53,7 @@ void Update::failDMCommands(bool _fail) {
   bodyParam_.insert_or_assign("fail_dmcommands", std::to_string(_fail));
 }
 
-CocoaTweet::API::Model::Tweet Update::process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+CocoaTweet::API::Model::Tweet Update::process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::Tweet tweet;
   HttpPost::process(_oauth, [&tweet](const std::string& _rcv) {
     tweet = CocoaTweet::API::Model::Tweet::parse(_rcv);
diff --git a/src/cocoatweet/api/status/update.h b/src/cocoatweet/api/status/update.h
index 1f3ff38..e0f3699 100644
--- a/src/cocoatweet/api/status/update.h
+++ b/src/cocoatweet/api/status/update.h
@@ -40,9 +40,9 @@ public:
   void failDMCommands(bool _fail);
 
   /// @brief process request for endpoint
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to oauth object
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to oauth object
   /// @param[out] CocoaTweet::API::Model::Tweet : request result
-  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  CocoaTweet::API::Model::Tweet process(std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
   std::string status_;
diff --git a/src/cocoatweet/api/status/userTimeline.cc b/src/cocoatweet/api/status/userTimeline.cc
index 7da4a3f..59c4930 100644
--- a/src/cocoatweet/api/status/userTimeline.cc
+++ b/src/cocoatweet/api/status/userTimeline.cc
@@ -13,7 +13,7 @@ void UserTimeline::screenName(const std::string& _screenName) {
 }
 
 std::vector<CocoaTweet::API::Model::Tweet> UserTimeline::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   std::vector<CocoaTweet::API::Model::Tweet> tweet;
   HttpGet::process(_oauth, [&tweet](const std::string& _rcv) {
     auto json = nlohmann::json::parse(_rcv);
diff --git a/src/cocoatweet/api/status/userTimeline.h b/src/cocoatweet/api/status/userTimeline.h
index 2da1b17..8c8f432 100644
--- a/src/cocoatweet/api/status/userTimeline.h
+++ b/src/cocoatweet/api/status/userTimeline.h
@@ -19,10 +19,10 @@ public:
   void screenName(const std::string& _screenName);
 
   /// @brief process request for endpoint
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to oauth object
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to oauth object
   /// @param[out] std::vector<CocoaTweet::API::Model::Tweet> : request result
   std::vector<CocoaTweet::API::Model::Tweet> process(
-      std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+      std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
   std::string status_;
diff --git a/src/cocoatweet/api/user/show.cc b/src/cocoatweet/api/user/show.cc
index eb53776..968b3ed 100644
--- a/src/cocoatweet/api/user/show.cc
+++ b/src/cocoatweet/api/user/show.cc
@@ -23,7 +23,7 @@ void Show::id(const std::string& _id) {
 }
 
 CocoaTweet::API::Model::User Show::process(
-    std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   CocoaTweet::API::Model::User user;
   HttpGet::process(_oauth, [&user](const std::string& _rcv) {
     user = CocoaTweet::API::Model::User::parse(_rcv);
diff --git a/src/cocoatweet/api/user/show.h b/src/cocoatweet/api/user/show.h
index f8848ee..dcde18e 100644
--- a/src/cocoatweet/api/user/show.h
+++ b/src/cocoatweet/api/user/show.h
@@ -23,10 +23,10 @@ public:
   void screenName(const std::string& _screenName);
 
   /// @brief process request for endpoint
-  /// @param[in] std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth : pointer to oauth object
+  /// @param[in] std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth : pointer to oauth object
   /// @param[out] CocoaTweet::API::Model::User : request result
   CocoaTweet::API::Model::User process(
-      std::weak_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+      std::weak_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
 private:
   std::string status_;
diff --git a/src/cocoatweet/api/user/user.cc b/src/cocoatweet/api/user/user.cc
index 298b3b1..0a06b07 100644
--- a/src/cocoatweet/api/user/user.cc
+++ b/src/cocoatweet/api/user/user.cc
@@ -2,7 +2,7 @@
 #include <cocoatweet/api/user/show.h>
 
 namespace CocoaTweet::API::Users{
-    User::User(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth) {
+    User::User(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth) {
   oauth_ = _oauth;
 }
 
diff --git a/src/cocoatweet/api/user/user.h b/src/cocoatweet/api/user/user.h
index f6bfea6..c4b904f 100644
--- a/src/cocoatweet/api/user/user.h
+++ b/src/cocoatweet/api/user/user.h
@@ -2,7 +2,7 @@
 #define COCOATWEET_API_USER_USER_H_
 
 #include "cocoatweet/api/interface/groupInterface.h"
-#include "cocoatweet/oauth/oauth.h"
+#include "cocoatweet/authentication/authenticator.h"
 #include <cocoatweet/api/model/user.h>
 #include <vector>
 #include <utility>
@@ -15,8 +15,8 @@ public:
   User() = default;
   
   /// @brief   constructor which finally should to be called.
-  /// @param[in] std::shared_ptr<CocoaTweet::OAuth::OAuth1> : pointer to OAuth object
-  User(std::shared_ptr<CocoaTweet::OAuth::OAuth1> _oauth);
+  /// @param[in] std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> : pointer to OAuth object
+  User(std::shared_ptr<CocoaTweet::Authentication::AuthenticatorBase> _oauth);
 
   CocoaTweet::API::Model::User show(const std::string& _screenName) const;
 
diff --git a/src/cocoatweet/oauth/oauth.cc b/src/cocoatweet/authentication/authenticate.cc
similarity index 61%
rename from src/cocoatweet/oauth/oauth.cc
rename to src/cocoatweet/authentication/authenticate.cc
index 1b8b7ae..d748458 100644
--- a/src/cocoatweet/oauth/oauth.cc
+++ b/src/cocoatweet/authentication/authenticate.cc
@@ -1,4 +1,4 @@
-#include "oauth.h"
+#include "authenticate.h"
 #include "cocoatweet/util/util.h"
 #include <random>
 #include <ctime>
@@ -22,10 +22,15 @@ extern "C" {
 #include <iostream>
 #endif
 
-namespace CocoaTweet::OAuth {
-OAuth1::OAuth1() : authType_(AuthType::OAuth) {}
+namespace CocoaTweet::Authentication {
+OAuth1::OAuth1() {
+  method_ = AuthenticationMethod::OAUTH10A;
+}
 
-OAuth1::OAuth1(const Key _key) : key_(_key), authType_(AuthType::OAuth) {}
+OAuth1::OAuth1(const Key _key){
+  key_ = _key;
+  method_ = AuthenticationMethod::OAUTH10A;
+}
 
 std::map<std::string, std::string> OAuth1::signature(
     const std::map<std::string, std::string>& _param, const std::string& _method,
@@ -49,10 +54,6 @@ std::map<std::string, std::string> OAuth1::signature(
 const std::string OAuth1::calculateAuthHeader(std::map<std::string, std::string> _bodyParam,
                                               const std::string& _method,
                                               const std::string& _url) {
-  if (authType_ == AuthType::Bearer) {
-    return "Authorization: Bearer " + key_.bearerToken();
-  }
-
   auto authParam   = oauthParam();
   auto sigingParam = authParam;
   if (!_bodyParam.empty()) {
@@ -77,66 +78,67 @@ const std::string OAuth1::calculateAuthHeader(std::map<std::string, std::string>
   return oauthHeader;
 }
 
-const std::string& OAuth1::generateBearerToken() {
-  auto signature    = key_.consumerKey() + ":" + key_.consumerSecret();
-  auto k64Signature = base64(signature);
-  auto authHeader   = std::string("Authorization: Basic ") + k64Signature;
-  auto contentType =
-      std::string("Content-Type: application/x-www-form-urlencoded;charset=UTF-8");
-  auto url         = std::string("https://api.twitter.com/oauth2/token");
-  auto requestBody = std::string("grant_type=client_credentials");
 
-  // do post
-  CURL* curl;
-  CURLcode res;
-  std::string rcv;
-  long responseCode;
-  curl = curl_easy_init();
-  if (curl) {
-    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
-    curl_easy_setopt(curl, CURLOPT_POST, 1);
-    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, requestBody.c_str());
-    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, requestBody.length());
-    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
-    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curlCallback_);
-    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (std::string*)&rcv);
-#ifndef NDEBUG
-    std::cout << "requestBody : " << requestBody << std::endl;
-    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
-#endif
-    // Headerを保持するcurl_slist*を初期化
-    struct curl_slist* headers = NULL;
-    // Authorizationをヘッダに追加
-    headers = curl_slist_append(headers, authHeader.c_str());
-    headers = curl_slist_append(headers, contentType.c_str());
-    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
-    res = curl_easy_perform(curl);
-    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode);
-    curl_easy_cleanup(curl);
-  }
-  if (res != CURLE_OK) {
-    throw std::runtime_error(std::string("INTERNAL ERROR : curl(") + std::to_string(res) + ")");
-    exit(1);
-  }
+// const std::string& OAuth1::generateBearerToken() {
+//   auto signature    = key_.consumerKey() + ":" + key_.consumerSecret();
+//   auto k64Signature = base64(signature);
+//   auto authHeader   = std::string("Authorization: Basic ") + k64Signature;
+//   auto contentType =
+//       std::string("Content-Type: application/x-www-form-urlencoded;charset=UTF-8");
+//   auto url         = std::string("https://api.twitter.com/oauth2/token");
+//   auto requestBody = std::string("grant_type=client_credentials");
 
-  auto j = nlohmann::json::parse(rcv);
-  if ((responseCode / 100) == 4) {
-    auto error   = j["errors"][0]["code"];
-    auto message = j["errors"][0]["message"];
-    if (j.count("error") != 0) {
-      // この形式はエラーコードを持たないのでエラー種別が特定できない
-      throw new CocoaTweet::Exception::Exception(j["error"]);
-    }
-    if (error.get<int>() == 44) {
-      throw CocoaTweet::Exception::InvalidParameterException(
-          message.get<std::string>().c_str());
-    }
-  }
+//   // do post
+//   CURL* curl;
+//   CURLcode res;
+//   std::string rcv;
+//   long responseCode;
+//   curl = curl_easy_init();
+//   if (curl) {
+//     curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+//     curl_easy_setopt(curl, CURLOPT_POST, 1);
+//     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, requestBody.c_str());
+//     curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, requestBody.length());
+//     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
+//     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curlCallback_);
+//     curl_easy_setopt(curl, CURLOPT_WRITEDATA, (std::string*)&rcv);
+// #ifndef NDEBUG
+//     std::cout << "requestBody : " << requestBody << std::endl;
+//     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+// #endif
+//     // Headerを保持するcurl_slist*を初期化
+//     struct curl_slist* headers = NULL;
+//     // Authorizationをヘッダに追加
+//     headers = curl_slist_append(headers, authHeader.c_str());
+//     headers = curl_slist_append(headers, contentType.c_str());
+//     curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
+//     res = curl_easy_perform(curl);
+//     curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode);
+//     curl_easy_cleanup(curl);
+//   }
+//   if (res != CURLE_OK) {
+//     throw std::runtime_error(std::string("INTERNAL ERROR : curl(") + std::to_string(res) + ")");
+//     exit(1);
+//   }
 
-  key_.bearerToken(j["access_token"]);
-  authType_ = AuthType::Bearer;
-  return key_.bearerToken();
-}
+//   auto j = nlohmann::json::parse(rcv);
+//   if ((responseCode / 100) == 4) {
+//     auto error   = j["errors"][0]["code"];
+//     auto message = j["errors"][0]["message"];
+//     if (j.count("error") != 0) {
+//       // この形式はエラーコードを持たないのでエラー種別が特定できない
+//       throw new CocoaTweet::Exception::Exception(j["error"]);
+//     }
+//     if (error.get<int>() == 44) {
+//       throw CocoaTweet::Exception::InvalidParameterException(
+//           message.get<std::string>().c_str());
+//     }
+//   }
+
+//   key_.bearerToken(j["access_token"]);
+//   authType_ = AuthType::Bearer;
+//   return key_.bearerToken();
+// }
 
 const std::string OAuth1::nonce() const {
   std::random_device engine;
@@ -156,16 +158,13 @@ const std::string OAuth1::timestamp() const {
 }
 
 const std::string OAuth1::method() const {
-  return SIGNATURE_METHOD_;
+  return "HMAC-SHA1";
 }
 
 const std::string OAuth1::version() const {
-  return OAUTH_VERSION_;
+  return "1.0";
 }
 
-const Key OAuth1::key() const {
-  return key_;
-}
 
 std::map<std::string, std::string> OAuth1::oauthParam() const {
   auto tmp = std::map<std::string, std::string>{{"oauth_nonce", nonce()},
@@ -235,4 +234,4 @@ std::string OAuth1::hmacSha1(std::string _key, std::string _data) {
   return static_cast<std::string>(k64);
 }
 
-} // namespace CocoaTweet::OAuth
+} // namespace CocoaTweet::Authentication
diff --git a/src/cocoatweet/oauth/oauth.h b/src/cocoatweet/authentication/authenticate.h
similarity index 64%
rename from src/cocoatweet/oauth/oauth.h
rename to src/cocoatweet/authentication/authenticate.h
index ccd2cfe..9bbfaac 100644
--- a/src/cocoatweet/oauth/oauth.h
+++ b/src/cocoatweet/authentication/authenticate.h
@@ -5,19 +5,19 @@
 #include <map>
 #include <memory>
 #include "key.h"
+#include <cocoatweet/authentication/authenticator.h>
 
-namespace CocoaTweet::OAuth {
-class OAuth1 {
+namespace CocoaTweet::Authentication {
+class OAuth1: public AuthenticatorBase {
 public:
-  enum AuthType { OAuth, Bearer };
-
   OAuth1();
   OAuth1(const Key _key);
   std::map<std::string, std::string> signature(const std::map<std::string, std::string>& _param,
                                                const std::string& _method,
                                                const std::string& _url);
 
-  const std::string& generateBearerToken();
+  // const std::string& generateBearerToken();
+  
   const std::string calculateAuthHeader(std::map<std::string, std::string> _bodyParam,
                                         const std::string& _method, const std::string& _url);
 
@@ -25,22 +25,11 @@ public:
   const std::string timestamp() const;
   const std::string method() const;
   const std::string version() const;
-  const Key key() const;
   std::map<std::string, std::string> oauthParam() const;
   std::string hmacSha1(std::string _key, std::string _data);
   const std::string base64(const std::string& _raw);
 
-private:
-  AuthType authType_;
-  Key key_;
-  const std::string SIGNATURE_METHOD_ = "HMAC-SHA1";
-  const std::string OAUTH_VERSION_    = "1.0";
-  static size_t curlCallback_(char* _ptr, size_t _size, size_t _nmemb, std::string* _stream) {
-    int realsize = _size * _nmemb;
-    _stream->append(_ptr, realsize);
-    return realsize;
-  }
 };
-} // namespace CocoaTweet::OAuth
+} // namespace CocoaTweet::Authentication
 
 #endif
diff --git a/src/cocoatweet/authentication/authenticator.cc b/src/cocoatweet/authentication/authenticator.cc
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/authentication/authenticator.h b/src/cocoatweet/authentication/authenticator.h
new file mode 100644
index 0000000..91b00dc
--- /dev/null
+++ b/src/cocoatweet/authentication/authenticator.h
@@ -0,0 +1,33 @@
+#ifndef COCOATWEET_AUTHENTICATION_AUTHENTICATORBASE_H
+#define COCOATWEET_AUTHENTICATION_AUTHENTICATORBASE_H
+
+#include <cocoatweet/authentication/key.h>
+namespace CocoaTweet::Authentication{
+class AuthenticatorBase{
+public:
+    enum class AuthenticationMethod{
+        OAUTH10A,
+        OAUTH2,
+        PLAIN,
+        NONE
+    };
+  
+  virtual const std::string calculateAuthHeader(std::map<std::string, std::string> _bodyParam,
+                                        const std::string& _method, const std::string& _url) = 0;
+  
+  const Key key() const{
+      return key_;
+  }
+
+protected:
+  AuthenticationMethod method_;
+  Key key_;
+  static size_t curlCallback_(char* _ptr, size_t _size, size_t _nmemb, std::string* _stream) {
+    int realsize = _size * _nmemb;
+    _stream->append(_ptr, realsize);
+    return realsize;
+  }
+};
+}
+
+#endif
diff --git a/src/cocoatweet/authentication/bearer.cc b/src/cocoatweet/authentication/bearer.cc
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/authentication/bearer.h b/src/cocoatweet/authentication/bearer.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/oauth/key.cc b/src/cocoatweet/authentication/key.cc
similarity index 81%
rename from src/cocoatweet/oauth/key.cc
rename to src/cocoatweet/authentication/key.cc
index 6230935..318c1a1 100644
--- a/src/cocoatweet/oauth/key.cc
+++ b/src/cocoatweet/authentication/key.cc
@@ -1,16 +1,19 @@
-#include "cocoatweet/oauth/key.h"
+#include "cocoatweet/authentication/key.h"
 #include "nlohmann/json.hpp"
 #include <fstream>
 #include <string>
 #include <typeinfo>
 
-namespace CocoaTweet::OAuth {
+namespace CocoaTweet::Authentication {
 Key Key::fromJsonFile(const std::string _jsonFile) {
   std::ifstream ifs(_jsonFile);
   std::string str((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
 
   auto j = nlohmann::json::parse(str);
   Key key;
+
+  key.authType(Key::AUTH_TYPE::OAUTH10A);
+
   if (j.contains("consumer_key")) {
     key.consumerKey(j["consumer_key"].get<std::string>());
   }
@@ -29,4 +32,4 @@ Key Key::fromJsonFile(const std::string _jsonFile) {
 
   return key;
 }
-} // namespace CocoaTweet::OAuth
+} // namespace CocoaTweet::Authentication
diff --git a/src/cocoatweet/oauth/key.h b/src/cocoatweet/authentication/key.h
similarity index 80%
rename from src/cocoatweet/oauth/key.h
rename to src/cocoatweet/authentication/key.h
index 8a39755..ef9e9ea 100644
--- a/src/cocoatweet/oauth/key.h
+++ b/src/cocoatweet/authentication/key.h
@@ -4,24 +4,32 @@
 #include <string>
 #include <map>
 
-namespace CocoaTweet::OAuth {
+namespace CocoaTweet::Authentication {
 class Key {
+public:
+	enum AUTH_TYPE{
+			OAUTH10A,
+			OAUTH2,
+			PLAIN
+	};
+
+private:
   std::string consumerKey_;
   std::string consumerSecret_;
   std::string accessToken_;
   std::string accessTokenSecret_;
   std::string bearerToken_;
-
+	AUTH_TYPE authType_;
 public:
   Key() : consumerKey_(""), consumerSecret_(""), accessToken_(""), accessTokenSecret_("") {}
   Key(const std::string& _consumerKey, const std::string& _consumerSecret,
-      const std::string& _accessToken, const std::string& _accessTokenSecret)
+      const std::string& _accessToken, const std::string& _accessTokenSecret, const AUTH_TYPE _authType = AUTH_TYPE::OAUTH10A)
       : consumerKey_(_consumerKey),
         consumerSecret_(_consumerSecret),
         accessToken_(_accessToken),
-        accessTokenSecret_(_accessTokenSecret) {}
-  Key(const std::string& _consumerKey, const std::string& _consumerSecret)
-      : consumerKey_(_consumerKey), consumerSecret_(_consumerSecret) {}
+        accessTokenSecret_(_accessTokenSecret), authType_(_authType) {}
+  Key(const std::string& _consumerKey, const std::string& _consumerSecret, const AUTH_TYPE _authType = AUTH_TYPE::OAUTH2)
+      : consumerKey_(_consumerKey), consumerSecret_(_consumerSecret), authType_(_authType){}
 
   void consumerKey(const std::string& _consumerKey) {
     consumerKey_ = _consumerKey;
@@ -59,6 +67,14 @@ public:
     return bearerToken_;
   }
 
+  const AUTH_TYPE authType() const {
+    return authType_;
+  }
+  
+  void authType(AUTH_TYPE _authType) {
+    authType_ = _authType;
+  }
+
   std::map<std::string, std::string> noSecret() const {
     return std::map<std::string, std::string>{{"oauth_consumer_key", consumerKey_},
                                               {"oauth_token", accessToken_}};
@@ -70,6 +86,6 @@ public:
 
   static Key fromJsonFile(const std::string _jsonFile);
 };
-} // namespace CocoaTweet::OAuth
+} // namespace CocoaTweet::Authentication
 
 #endif
diff --git a/src/cocoatweet/authentication/plain.cc b/src/cocoatweet/authentication/plain.cc
new file mode 100644
index 0000000..e69de29
diff --git a/src/cocoatweet/authentication/plain.h b/src/cocoatweet/authentication/plain.h
new file mode 100644
index 0000000..7fe3c49
--- /dev/null
+++ b/src/cocoatweet/authentication/plain.h
@@ -0,0 +1,11 @@
+#ifndef COCOATWEET_AUTHENTICATION_PLAIN_H
+#define COCOATWEET_AUTHENTICATION_PLAIN_H
+
+#include <cocoatweet/authentication/authenticator.h>
+
+namespace CocoaTweet::Authentication{
+	class Plain: public AuthenticatorBase {
+	};
+}
+
+#endif
diff --git a/src/cocoatweet/oauth/authorize.h b/src/cocoatweet/oauth/authorize.h
index e69de29..db5033a 100644
--- a/src/cocoatweet/oauth/authorize.h
+++ b/src/cocoatweet/oauth/authorize.h
@@ -0,0 +1,22 @@
+#ifndef COCOATWEET_OAUTH_AUTHORIZE_H_
+#define COCOATWEET_OAUTH_AUTHORIZE_H_
+
+#include "cocoatweet/api/interface/groupInterface.h"
+#include <vector>
+#include <utility>
+
+namespace CocoaTweet::Authentication{
+class Auth: public groupInterface {
+public:
+  enum AuthType { OAuth, Bearer };
+  
+Auth();
+Auth(Key _key);
+authorize(const bool app_only);
+
+private:
+Key key_;
+}
+}
+
+#endif
\ No newline at end of file
diff --git a/src/cocoatweet/util/util.cc b/src/cocoatweet/util/util.cc
index cb1ebfc..771e53d 100644
--- a/src/cocoatweet/util/util.cc
+++ b/src/cocoatweet/util/util.cc
@@ -1,6 +1,9 @@
 #include "cocoatweet/util/util.h"
 #include <cctype>
 #include <iomanip>
+#include <vector>
+
+#include <iostream>
 
 namespace CocoaTweet::Util {
 std::string urlEncode(const std::string& _str) {
@@ -33,4 +36,34 @@ std::string join(const std::vector<std::string> _vec, const std::string& _delim)
   return str;
 }
 
+
+std::unordered_map<std::string, std::string> parse(const std::string str, const char _delim, const char _conn){
+   int first = 0;
+   int last = str.find_first_of(_delim);
+   std::vector<std::string> result;
+ 
+   while (first < str.size()) {
+     result.push_back(str.substr(first, last - first));
+     first = last + 1;
+     last = str.find_first_of(_delim, first);
+     if (last == std::string::npos) last = str.size();
+   }
+
+   auto mp = std::unordered_map<std::string, std::string>();
+   for(auto elm: result){
+     int pos = elm.find_first_of(_conn);
+
+     std::cout << pos << std::endl;
+     if(pos == std::string::npos){
+       mp.insert_or_assign(elm, "");
+     }else{
+       auto key = elm.substr(0, pos);
+       auto val = elm.substr(pos + 1);
+       mp.insert_or_assign(key, val);
+     }
+   }
+
+   return mp;
+}
+
 } // namespace CocoaTweet::Util
diff --git a/src/cocoatweet/util/util.h b/src/cocoatweet/util/util.h
index a35e2f0..64d172f 100644
--- a/src/cocoatweet/util/util.h
+++ b/src/cocoatweet/util/util.h
@@ -4,10 +4,12 @@
 #include <vector>
 #include <string>
 #include <sstream>
+#include <unordered_map>
 
 namespace CocoaTweet::Util {
 std::string urlEncode(const std::string& _str);
 std::string join(const std::vector<std::string> _vec, const std::string& _delim);
+std::unordered_map<std::string, std::string> parse(const std::string str, const char _delim, const char _conn);
 } // namespace CocoaTweet::Util
 
 #endif
diff --git a/test/oauth/key.cc b/test/oauth/key.cc
index f03b2b8..de2c8ba 100644
--- a/test/oauth/key.cc
+++ b/test/oauth/key.cc
@@ -2,11 +2,11 @@
 
 #include <boost/test/included/unit_test.hpp>
 
-#include "cocoatweet/oauth/key.h"
+#include "cocoatweet/authentication/key.h"
 
 BOOST_AUTO_TEST_SUITE(oauth_key)
 BOOST_AUTO_TEST_CASE(test01) {
-  CocoaTweet::OAuth::Key key;
+  CocoaTweet::Authentication::Key key;
 
   BOOST_TEST(key.consumerKey() == "");
   BOOST_TEST(key.consumerSecret() == "");
@@ -15,7 +15,7 @@ BOOST_AUTO_TEST_CASE(test01) {
 }
 
 BOOST_AUTO_TEST_CASE(test02) {
-  CocoaTweet::OAuth::Key key("consumerKey", "consumerSecret", "accessToken",
+  CocoaTweet::Authentication::Key key("consumerKey", "consumerSecret", "accessToken",
                              "accessTokenSecret");
 
   BOOST_TEST(key.consumerKey() == "consumerKey");