code: public function getRequestToken($settings,
                                      OAuthConsumerInterface $consumer,
                                      OAuthTokenInterface $token)
      {
          $url = $settings['auth_api_url'].$settings['request_token_uri'];
          $options = ['oauth_callback' => $settings['callback_url']];
  
          $headers = $this->headers($settings, 'POST', $url, $consumer, $token, $options);
          // build request
          $request = ['url' => $url,'headers' => $headers];
  
          return $this->token->makeRequestToken($this->http->post($request));
      }
docs: Requests Twitter for a request token.
  
  @param array                                                                  $settings
  @param Vinelab\Auth\Social\Providers\Twitter\Contracts\OAuthConsumerInterface $consumer
  @param Vinelab\Auth\Social\Providers\Twitter\Contracts\OAuthTokenInterface    $token
  
  @return Vinelab\Auth\Social\Providers\Twitter\Contracts\OAuthTokenInterface