public function actionSendEmail()
 {
     $emailBindRequestForm = new EmailBindRequestForm();
     Yii::$app->response->format = Response::FORMAT_JSON;
     $emailBindRequestForm->email = Yii::$app->session['emailBind'];
     if ($emailBindRequestForm->validate() && $emailBindRequestForm->sendEmail()) {
         return ['status' => 'ok'];
     }
     return ['status' => 'err', 'msg' => $emailBindRequestForm->getFirstError('email')];
 }