/**
  * @param string $url
  * @param array $vars
  * @return bool|\CurlResponse
  * @throws NotAuthenticatedException
  */
 function post($url, $vars = array())
 {
     $response = parent::post($this->config->getApiUrl() . $url, $vars);
     $this->checkResponse($response);
     return $response;
 }