original_string: public function callback() {
  
          $token = required_param('oauth_token', PARAM_RAW);
          $verifier = required_param('oauth_verifier', PARAM_RAW);
          $secret = $this->flickr->get_request_token_secret(['caller' => 'repository_flickr']);
  
          // Exchange the request token for the access token.
          $accesstoken = $this->flickr->get_access_token($token, $secret, $verifier);
  
          // Store the access token and the access token secret in the user preferences.
          set_user_preference('repository_flickr_access_token', $accesstoken['oauth_token']);
          set_user_preference('repository_flickr_access_token_secret', $accesstoken['oauth_token_secret']);
      }
code: public function callback() {
  
          $token = required_param('oauth_token', PARAM_RAW);
          $verifier = required_param('oauth_verifier', PARAM_RAW);
          $secret = $this->flickr->get_request_token_secret(['caller' => 'repository_flickr']);
  
          // Exchange the request token for the access token.
          $accesstoken = $this->flickr->get_access_token($token, $secret, $verifier);
  
          // Store the access token and the access token secret in the user preferences.
          set_user_preference('repository_flickr_access_token', $accesstoken['oauth_token']);
          set_user_preference('repository_flickr_access_token_secret', $accesstoken['oauth_token_secret']);
      }
code_tokens: public function callback ( ) { $ token = required_param ( 'oauth_token' , PARAM_RAW ) ; $ verifier = required_param ( 'oauth_verifier' , PARAM_RAW ) ; $ secret = $ this -> flickr -> get_request_token_secret ( [ 'caller' => 'repository_flickr' ] ) ; // Exchange the request token for the access token. $ accesstoken = $ this -> flickr -> get_access_token ( $ token , $ secret , $ verifier ) ; // Store the access token and the access token secret in the user preferences. set_user_preference ( 'repository_flickr_access_token' , $ accesstoken [ 'oauth_token' ] ) ; set_user_preference ( 'repository_flickr_access_token_secret' , $ accesstoken [ 'oauth_token_secret' ] ) ; }
docstring: Handle the oauth authorize callback
  
  This is to exchange the approved request token for an access token.
docstring_tokens: Handle the oauth authorize callback