Major refactoring to include frontend...

src/Controller/HomeController.php

@@ -6,13 +6,14 @@ use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Attribute\Route;
 
-class SecurityController extends AbstractController
+class HomeController extends AbstractController
 {
-    #[Route('/login', name: 'app_login')]
+    #[Route('/', name: 'app_home')]
     public function index(): Response
     {
-        return $this->json([
-            $this->getUser()?->getId() ?? null
+        return $this->render('home/index.html.twig', [
+            'controller_name' => 'HomeController',
         ]);
     }
 }
+

src/Controller/LoginController.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\User;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;
+
+class LoginController extends AbstractController
+{
+    #[Route('/login', name: 'app_login')]
+    public function index(AuthenticationUtils $authenticationUtils): Response
+    {
+        $error = $authenticationUtils->getLastAuthenticationError();
+        $lastUsername = $authenticationUtils->getLastUsername();
+
+        return $this->render('login/index.html.twig', [
+            'last_username' => $lastUsername,
+            'error'         => $error,
+        ]);
+    }
+}