Authコンポーネントによるログイン認証

AppControllerの設定

class AppController extends Controller
{
    public function initialize()
    {
        parent::initialize();

        $this->loadComponent('RequestHandler', [
            'enableBeforeRedirect' => false,
        ]);
        $this->loadComponent('Flash');
        $this->loadComponent('Acl.Acl');
        $this->loadComponent('Auth', [
            'loginAction' => [
                'prefix' => false,
                'controller' => 'Users',
                'action' => 'login',
            ],
            'loginRedirect' => [
                'prefix' => false,
                'controller' => 'Pages',
                'action' => 'display',
                'home',
            ],
            'logoutRedirect' => [
                'prefix' => false,
                'controller' => 'Users',
                'action' => 'login',
            ],
           'authenticate' => [
                'Form' => [
                    'fields' => [
                        'username' => 'username',
                        'password' => 'password',
                    ]
                ]
            ],
        ]);

UsersControllerの設定

class UsersController extends AppController
{
    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(__('Username or password is incorrect'));
            }
        }
    }

    public function logout() {
        return $this->redirect($this->Auth->logout());
    }
}