CakePHP-Dienste

<?php use Cake\Core\Plugin;
use Cake\Routing\RouteBuilder;
use Cake\Routing\Router;
Router::defaultRouteClass('DashedRoute');
Router::scope('/', function (RouteBuilder $routes) {
   $routes->connect('/auth',['controller'=>'Authexs','action'=>'index']);
   $routes->connect('/login',['controller'=>'Authexs','action'=>'login']);
   $routes->connect('/logout',['controller'=>'Authexs','action'=>'logout']);
   $routes->fallbacks('DashedRoute');
});
Plugin::routes();

<?php namespace App\Controller;
use Cake\Controller\Controller;
use Cake\Event\Event;
use Cake\Controller\Component\AuthComponent;
class AppController extends Controller {
   public function initialize() {
      parent::initialize();
      $this->loadComponent('RequestHandler');
      $this->loadComponent('Flash');
         $this->loadComponent('Auth', [
            'authenticate' => [
               'Form' => [
                  'fields' => [
               'username' => 'username',
               'password' => 'password'
            ]
         ]
      ],
      'loginAction' => [
         'controller' => 'Authexs',
         'action' => 'login'
      ],
      'loginRedirect' => [
         'controller' => 'Authexs',
         'action' => 'index'
      ],
      'logoutRedirect' => [
         'controller' => 'Authexs',
         'action' => 'login'
      ]
   ]);
}
public function beforeFilter(Event $event) {
      $this->Auth->allow(['index','view']);
      $this->set('loggedIn', $this->Auth->user());
   }
}

<?php namespace App\Controller;
use App\Controller\AppController;
use Cake\ORM\TableRegistry;
use Cake\Datasource\ConnectionManager;
use Cake\Event\Event;
use Cake\Auth\DefaultPasswordHasher;
class AuthexsController extends AppController {
   var $components = array('Auth');
   public function index(){
   }
   public function login(){
      if($this->request->is('post')) {
         $user = $this->Auth->identify();
         if($user){
            $this->Auth->setUser($user);
            return $this->redirect($this->Auth->redirectUrl());
         } else
         $this->Flash->error('Your username or password is incorrect.');
      }
   }
   public function logout(){
      return $this->redirect($this->Auth->logout());
   } 
}
?>

<?php echo $this->Form->create();
   echo $this->Form->control('username');
   echo $this->Form->control('password');
   echo $this->Form->button('Submit');
   echo $this->Form->end();
?>

You are successfully logged out.

You are successfully logged in. 
<?php echo $this->Html->link('logout',[
      "controller" => "Authexs","action" => "logout"
   ]); 
?>