UserController.php

<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;

class UserController extends AbstractController
{
    /**
     * @Route("/user", name="user")
     */
    public function index()
    {
        return $this->render('user/index.html.twig', [
            'controller_name' => 'UserController',
        ]);
    }

    /**
     * @Route("/login", name="security_login")
     */
    public function login(AuthenticationUtils $authenticationUtils)
    {
        return $this->render('user/login.html.twig', [
            'last_username' => $authenticationUtils->getLastUsername(),
            'error' => $authenticationUtils->getLastAuthenticationError()
        ]);
    }

    /**
     * @Route("/logout", name="security_logout")
     */
    public function logout()
    {

    }
}