test get all users not in group

src/Auth/DataAccess/LuticateGroupsDataAccess.php

 
     public static function getOtherUsers($group_id, $page = 0, $perPage = PHP_INT_MAX, $query = "")
     {
-        $model = LuticateUsers::where("luticate_users.id", "IS", "NULL")
+        $model = LuticateUsers::where("luticate_users_groups.id", "IS", "NULL")
             ->leftJoin("luticate_users_groups", function($join) use ($group_id)
             {
                 $join->on("luticate_users.id", "=", "luticate_users_groups.user_id")