public function api_verify_captcha()
 {
     $response = new JSendResponse();
     if (!($verified = $this->_verify($this->request))) {
         die('Failed to verify.');
     }
     if ($this->request->data['entity'] === 'mail.security') {
         $response->success(['email' => '*****@*****.**']);
     }
     $this->render(array('type' => $this->request->accepts(), 'data' => $response->to('array')));
 }