fix: show only Iranian provinces on register page

app/Http/Controllers/Auth/RegisterController.php

@@ -5,6 +5,7 @@ namespace App\Http\Controllers\Auth;
 use App\Enums\User\UserStatus;
 use App\Http\Controllers\Controller;
 use App\Http\Requests\Auth\RegisterPostRequest;
+use App\Models\Country;
 use App\Models\File;
 use App\Models\Province;
 use App\Models\User;
@@ -21,7 +22,12 @@ class RegisterController extends Controller
         $withOutHeader = true;
         $withOutFooter = true;
 
+        $iranCountry = Country::where('name', 'iran')->first();
+
         $provinces = Province::where('status', 1)
+            ->whereHas('cities', function ($query) use ($iranCountry) {
+                $query->where('county_id', $iranCountry->id);
+            })
             ->orderBy('name')
             ->pluck('name', 'id');