public JsonResult Index()
        {
            ConvertibleHashtable h  = ConvertibleHashtable.fromRequest();
            ConvertibleHashtable ud = ConvertibleHashtable.fromJObject((JObject)h["user_data"]);
            ApiKey k = ApiKey.getApiKey();

            if (k.isAdmin())
            {
                if (h["type"].ToString() == "supplier")
                {
                    ud.merge(((JObject)h["supplier_data"]).ToObject <ConvertibleHashtable>());
                    if (ud.ContainsKey("user_id"))
                    {
                        ud.Remove("user_id");
                    }
                    ud.toObject <Supplier>().insert();
                }
                else if (h["type"].ToString() == "admin")
                {
                    ud.toObject <Admin>().insert();
                }
                else
                {
                    return(Json(Costants.WRONG_USER_TYPE, JsonRequestBehavior.AllowGet));
                }
                return(Json(Costants.OK, JsonRequestBehavior.AllowGet));
            }
            else
            {
                return(Json(Costants.UNAUTHORIZED, JsonRequestBehavior.AllowGet));
            }
        }