code: protected function request($url, array $options = [])
      {
          $httpClient = new Http;
  
          try {
              $response = $httpClient->request('POST', $url, [
                  'form_params' => $options,
                  'query' => [$this->accessToken->getQueryName() => $this->accessToken->getAccessToken(true)]
              ]);
          } catch (\GuzzleHttp\Exception\ClientException $e) {
              if ($e->hasResponse()) {
                  $response = $e->getResponse();
              } else {
                  throw $e;
              }
          }
  
  
          return $httpClient->parseJson($response);
      }
docs: Append access_token to this url
  
  @param  string $url
  
  @return string