use Lucky service in a controller to return a lucky number

DefaultController.php

<?php
// src/Controller/DefaultController.php

namespace App\Controller;

use App\Lucky;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;

class DefaultController extends AbstractController
{
    /**
     * @Route("/", name="default")
     */
    public function index()
    {
        $lucky = new Lucky();
        return $this->json(['number' => $lucky->getNumber()]);
    }
}