Fix User model

app/Http/Controllers/Auth/RegisteredUserController.php

@@ -31,13 +31,17 @@ class RegisteredUserController extends Controller
     public function store(Request $request): RedirectResponse
     {
         $request->validate([
-            'name' => ['required', 'string', 'max:255'],
+            'firstname' => ['required', 'string', 'max:255'],
+            'lastname' => ['required', 'string', 'max:255'],
+            'username' => ['required', 'string', 'max:255'],
             'email' => ['required', 'string', 'email', 'max:255', 'unique:'.User::class],
             'password' => ['required', 'confirmed', Rules\Password::defaults()],
         ]);
 
         $user = User::create([
-            'name' => $request->name,
+            'firstname' => $request->firstname,
+            'lastname' => $request->lastname,
+            'username' => $request->username,
             'email' => $request->email,
             'password' => Hash::make($request->password),
         ]);

app/Models/User.php

@@ -18,7 +18,9 @@ class User extends Authenticatable
      * @var array<int, string>
      */
     protected $fillable = [
-        'name',
+        'firstname',
+        'lastname',
+        'username',
         'email',
         'password',
     ];