AuthController.php

<?php

namespace ActivismBe\Controllers;

use Silex\Application;
use Silex\Api\ControllerProviderInterface;
use Symfony\Component\HttpFoundation\Request;
use ActivismBe\Validators\LoginValidator;

class AuthController implements ControllerProviderInterface
{
    /**
     * Variable used to put the app instance in.
     *
     * @var mixed
     */
    private $app;

    /**
     * IndexController instance.
     *
     * @return void.
     */
    public function __construct()
    {
        $this->app = $app;
    }

    /**
     * Factory routing instance.
     *
     * @param  Application $app
     * @return mixed
     */
    public function connect(Application $app)
    {
        $factory = $app['controllers_factory'];

        $factory->get('/login','ActivismBe\Controllers\AuthController::loginView')->bind('login.view');
        $factory->get('/register', 'ActivismBe\Controllers\AuthController::registerView')->bind('register.view');
        $factory->post('/login', 'ActivismBe\Controllers\AuthController::authenticate')->bind('login.authenticate');
        $factory->post('/register', 'ActivismBe\Controllers\AuthController::registerMethod')->bind('register.method');

        return $factory;
    }

    /**
     *
     */
    public function loginView()
    {
        return $app['twig']->render('auth/login.html.twig');
    }

    /**
     * @param Request $input
     */
    public function authenticate(Request $input, LoginValidator $validation)
    {
        if ($validation->validate($input->all())) {
            return 'no errors';
        } else {
            return 'We got some problems here';
        }
    }

    /**
     *
     */
    public function registerView()
    {

    }

    /**
     *
     */
    public function registerMethod()
    {

    }
}

index.php

// Create the app instance
$app = new Silex\Application();

// Application general config
$app['debug'] = true;

// Load the config for the service providers.
$dbConfig   = new ActivismBe\Config\Database();
$viewConfig = new ActivismBe\Config\View();

// Register service providers.
$app->register(new Silex\Provider\ValidatorServiceProvider());
$app->register(new \JG\Silex\Provider\CapsuleServiceProvider(), $dbConfig->bootConfig());
$app->register(new Silex\Provider\TwigServiceProvider(), $viewConfig->bootConfig());

// Routing
// $app->mount('/', new ActivismBe\Controllers\IndexController());
$app->mount('/auth', new ActivismBe\Controllers\AuthController($app));
// $app->mount('/users', new ActivismBe\Controllers\UsersController);