public function actionIndex()
 {
     $model = new UserForm(['scenario' => 'registration']);
     //$model->init();
     if (isset($_POST['request-button']) && $model->load(Yii::$app->request->post())) {
         $error = 0;
         $error = $model->insertUser();
         if (!$error) {
             //mail ('*****@*****.**',Yii::t('registration','Registration'),' User_order: '.$model->username,'From: admin@sos.com \r\n');
             Yii::$app->session->setFlash('success', Yii::t('registration', 'Confirm registration') . $model->login);
             return $this->redirect(['guestlk/index', 'username' => $model->login]);
         } else {
             Yii::$app->session->setFlash('error', Yii::t('registration', $error . '_err_msg'));
             return $this->render('index', ['model' => $model]);
         }
     } else {
         if ($model->load(Yii::$app->request->post())) {
             return $this->refresh();
         }
         return $this->render('index', ['model' => $model]);
     }
 }