use the right Notification Facades

app/Http/Controllers/NotificationsController.php

@@ -2,8 +2,7 @@
 
 namespace App\Http\Controllers;
 
-use App\Models\Notification;
-use App\Models\User;
+use Illuminate\Support\Facades\Notification;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Log;