/**
  * @inheritdoc
  */
 public static function findIdentity($id)
 {
     $user = User::findOne(['id' => $id]);
     if ($user) {
         return $user;
     } else {
         return null;
     }
 }
 public function actionUser()
 {
     $authManager = \Yii::$app->authManager;
     return $this->render('user', ['users' => User::find()->asArray()->all(), 'roles' => $authManager->getRoles(), 'authManager' => $authManager]);
 }