/**
  * Set authentication parameters for the request
  *
  * @since 2.0
  * @param string $consumer_key API consumer key
  * @param string $consumer_secret API consumer secret
  * @return string request URL with authentication parameters added
  */
 protected function get_url_with_auth($consumer_key, $consumer_secret)
 {
     $auth = new WC_API_Client_Authentication($this->request->url, $consumer_key, $consumer_secret);
     if ($auth->is_ssl()) {
         // query string authentication over SSL works with all servers, whereas HTTP basic auth fails in certain cases
         // see https://github.com/kloon/WooCommerce-REST-API-Client-Library/issues/29
         $this->request->params = array_merge($this->request->params, array('consumer_key' => $auth->get_consumer_key(), 'consumer_secret' => $auth->get_consumer_secret()));
     } else {
         $this->request->params = array_merge($this->request->params, $auth->get_oauth_params($this->request->params, $this->request->method));
     }
     // build url
     return $this->request->url . (!empty($this->request->params) ? '?' . http_build_query($this->request->params) : '');
 }