The Problem: Yii2 utilizes by default UserIdentity configured in config/web.php for connection, this object appy one table to authentication ('identityClass' => 'app\painel\models\User'). How to authentication from diferent tables? Solution: Create instances in web.php to uses UserIdentify. eg:
 
```php
 
$user = \Yii::$app->user; $school = \Yii::$app->school; $teacher = \Yii::$app->teacher;
 
```
 
 
My config/web.php

```php

'user' => [
'class'=>'yii\web\User',