public function actionNotification()
 {
     $post = Yii::$app->request->post();
     $keys = array_keys($post['UsersTournaments']);
     $models = UsersTournaments::find()->where(['in', 'id', $keys])->indexBy('id')->all();
     if (UsersTournaments::loadMultiple($models, $post)) {
         foreach ($models as $model) {
             $model->save(false);
         }
         Yii::$app->session->setFlash('success', 'Параметры уведомлений успешно сохранены');
     }
     return $this->goBack();
 }