gistfile1.php

<?php

use App\Controller\AppController;
use Cake\Event\Event;
use Cake\Network\Exception\NotFoundException;

class UsersController extends AppController {

    public function beforeFilter(Event $event) {
        parent::beforeFilter($event);
        // Allow users to register and logout.
        // You should not add the "login" action to allow list. Doing so would
        // cause problems with normal functioning of AuthComponent.
        $this->Auth->allow(['add', 'logout']);
    }

    public function index() {
        $this->set('users', $this->Users->find('all'));
    }

    public function view($id) {
        if (!$id) {
            throw new NotFoundException(__('Invalid user'));
        }

        $user = $this->Users->get($id);
        $this->set(compact('user'));
    }

    public function add() {
        $user = $this->Users->newEntity();
        if ($this->request->is('post')) {
            $user = $this->Users->patchEntity($user, $this->request->data);
            if ($this->Users->save($user)) {
                $this->Flash->success(__('The user has been saved.'));
                return $this->redirect(['action' => 'add']);
            }
            $this->Flash->error(__('Unable to add the user.'));
        }
        $this->set('user', $user);
    }

    public function login() {
        if ($this->request->is('post')) {
            $user = $this->Auth->identify();
            if ($user) {
                $this->Auth->setUser($user);
                return $this->redirect($this->Auth->redirectUrl());
            }
            $this->Flash->error(__('Invalid username or password, try again'));
        }
    }

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

}