Repository type does not match with ManagerRegistry

This PHP code part is valid:

```php
$user = $this->getDoctrine()->getRepository(User::class)->find(
    $this->request->query->get('id')
);
```

`$this->getDoctrine()` return a `ManagerRegistry` instance.

But the final `$user` does not seems to be typed:

```
Call to an undefined method object::getUsername().
```

Using the `EntityManagerInterface` directly make things working.