original_string: public function logout() {
  
          set_user_preference('repository_flickr_access_token', null);
          set_user_preference('repository_flickr_access_token_secret', null);
  
          $this->accesstoken = null;
          $this->accesstokensecret = null;
  
          return $this->print_login();
      }
code: public function logout() {
  
          set_user_preference('repository_flickr_access_token', null);
          set_user_preference('repository_flickr_access_token_secret', null);
  
          $this->accesstoken = null;
          $this->accesstokensecret = null;
  
          return $this->print_login();
      }
code_tokens: public function logout ( ) { set_user_preference ( 'repository_flickr_access_token' , null ) ; set_user_preference ( 'repository_flickr_access_token_secret' , null ) ; $ this -> accesstoken = null ; $ this -> accesstokensecret = null ; return $ this -> print_login ( ) ; }
docstring: Purge the stored access token and related user data.
  
  @return string
docstring_tokens: Purge the stored access token and related user data .