Как установить пароль на crud?

создал crud под названием admin , конечно туда может зайти любой sitename.com/admin и использовать методы REST new show edit delete

src/Controller/AdminController.php

<?php
namespace App\Controller;
use App\Entity\Admin;
use App\Form\AdminType;
use App\Repository\AdminRepository;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
/**
 * @Route("/admin")
 */
class AdminController extends Controller
{
    /**
     * @Route("/", name="admin_index", methods="GET")
     */
    public function index(AdminRepository $adminRepository): Response
    {
        return $this->render('admin/index.html.twig', ['admins' => $adminRepository->findAll()]);
    }
    /**
     * @Route("/new", name="admin_new", methods="GET|POST")
     */
    public function new(Request $request): Response
    {
        $admin = new Admin();
        $form = $this->createForm(AdminType::class, $admin);
        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $em->persist($admin);
            $em->flush();
            return $this->redirectToRoute('admin_index');
        }
        return $this->render('admin/new.html.twig', [
            'admin' => $admin,
            'form' => $form->createView(),
        ]);
    }
    /**
     * @Route("/{id}", name="admin_show", methods="GET")
     */
    public function show(Admin $admin): Response
    {
        return $this->render('admin/show.html.twig', ['admin' => $admin]);
    }
    /**
     * @Route("/{id}/edit", name="admin_edit", methods="GET|POST")
     */
    public function edit(Request $request, Admin $admin): Response
    {
        $form = $this->createForm(AdminType::class, $admin);
        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            $this->getDoctrine()->getManager()->flush();
            return $this->redirectToRoute('admin_edit', ['id' => $admin->getId()]);
        }
        return $this->render('admin/edit.html.twig', [
            'admin' => $admin,
            'form' => $form->createView(),
        ]);
    }
    /**
     * @Route("/{id}", name="admin_delete", methods="DELETE")
     */
    public function delete(Request $request, Admin $admin): Response
    {
        if ($this->isCsrfTokenValid('delete'.$admin->getId(), $request->request->get('_token'))) {
            $em = $this->getDoctrine()->getManager();
            $em->remove($admin);
            $em->flush();
        }
        return $this->redirectToRoute('admin_index');
    }
}

и вопрос в том как установить пароль на этот контролер ? но при этом метод show был бы доступен всем без пароля ?