Creating a user in M, V, C

First, create a database with a users table or collection, with at least a primary key (usually id or _id) and the fields username and password (these could of course be renamed, but that requires more configuration).

The Model

Create the model in models/Users.php:

namespace app\models;
class Users extends \lithium\data\Model {}

Then, create a model filter in a new bootstrap file in app/config/bootstrap/ called user.php. This file will automatically hash user passwords before the accounts are created. The Password class will automatically use the most secure hashing method available on your system:

use app\models\Users;
use lithium\aop\Filters;
use lithium\security\Password;
Filters::apply(Users::class, 'save', function($params, $next) {
    if ($params['data']) {
        $params['entity']->set($params['data']);
        $params['data'] = [];
    }
    if (!$params['entity']->exists()) {
        $params['entity']->password = Password::hash($params['entity']->password);
    }
    return $next($params);
});

Now add the following line to app/config/bootstrap.php to include your new user.php bootstrap file.

require __DIR__ . '/bootstrap/user.php';

The Controller

Create this file in controllers/UsersController:

namespace app\controllers;
use lithium\security\Auth;
use app\models\Users;
class UsersController extends \lithium\action\Controller {
    public function index() {
        $users = Users::all();
        return compact('users');
    }
    public function add() {
        $user = Users::create($this->request->data);
        if (($this->request->data) && $user->save()) {
            return $this->redirect('Users::index');
        }
        return compact('user');
    }
}

The views

Then create the templates.

views/users/add.html.php:

<h2>Add user</h2>
<?= $this->form->create($user) ?>
    <?= $this->form->field('username') ?>
    <?= $this->form->field('password', ['type' => 'password']) ?>
    <?= $this->form->submit('Create me') ?>
<?= $this->form->end() ?>

views/users/index.html.php:

<h2>Users</h2>
<ul>
    <?php foreach ($users as $user) { ?>
        <li><?= $user->username ?></li>
    <?php } ?>
</ul>