public HttpResponseMessage GetOrder(string order = "all")
        {
            switch (order.ToLower())
            {
                case "all":
                    return Request.CreateResponse(HttpStatusCode.OK, db.Order.ToList());
                case "paid":
                    return Request.CreateResponse(HttpStatusCode.OK, db.Order.Where(e => e.PaimentStatus == "Paid").ToList());
                case "notpaid":
                    return Request.CreateResponse(HttpStatusCode.OK, db.Order.Where(e => e.PaimentStatus == null).ToList());
                default:
                    return Request.CreateResponse(HttpStatusCode.OK, db.Order.FirstOrDefault(e => e.OrderId == order));
            }

        }