crate service and request for create user

app/Http/Requests/V3/Dashboard/UserManagement/GiveRoleRequest.php

@@ -23,8 +23,7 @@ class GiveRoleRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'roles' => 'array',
-            'roles.*' => 'integer|exists:permissions,id',
+            'role' => 'required|exists:roles,id',
         ];
     }
 }