But de l'article "Récupérer plus simplement l'utilisateur dans un contrôleur Symfony"

MyController.php

<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Core\User\UserInterface;

class MyController extends AbstractController
{
    /**
     * @Route("/dashboard", name="dashboard")
     */
    public function index(Request $request, UserInterface $user)
    {
       return new Response(sprintf('Hello %s', $user->getUsername());
    }
}