Error not indicated in blog-auth-example docs

[davepartner]

In usercontroller.php

If i dont include:

use Cake\Event\Event;
//before using
public function beforeFilter(Event $event)
{ ...}

i'll get the error:
Declaration of App\Controller\UsersController::beforeFilter() should be compatible with App\Controller\AppController::beforeFilter(Cake\Event\Event $event) [APP/Controller\UsersController.php, line 12]

This was not indicated in the blog-auth-example tutorial. http://book.cakephp.org/3.0/en/tutorials-and-examples/blog-auth-example/auth.html#authentication-login-and-logout

[markstory]

Pull request up to add a more complete example.