DEleted function in request and changed the way the controller uses it,

app/Http/Controllers/Admin/UserManagementController.php

@@ -6,6 +6,7 @@ use App\Http\Controllers\Controller;
 use App\Http\Requests\Admin\UpdateUserAdminStatusRequest;
 use App\Models\User;
 use Illuminate\Http\RedirectResponse;
+use Illuminate\Support\Arr;
 use Inertia\Inertia;
 use Inertia\Response;
 
@@ -24,6 +25,7 @@ class UserManagementController extends Controller
 
     public function update(UpdateUserAdminStatusRequest $request, User $user): RedirectResponse
     {
+
         $user->forceFill([
             'is_admin' => $request->boolean('is_admin'),
         ])->save();