public Response DailyOrderDateRange(string token, string user)
 {
     Response response = new Response();
     if (string.IsNullOrEmpty(token) || !token.Equals(_token))
     {
         response.code = "404";
         response.message = "Invild token";
     }
     else
     {
         var data = PurchaseHelper.GetOrderDateRange("DailyPO", user);
         if (data == null)
         {
             response.code = "500";
             response.message = "No Data";
         }
         else
         {
             response.code = "200";
             response.content = data;
         }
     }
     return response;
 }