public async Task <HttpResponseMessage> Paging(int pageSize, int pageIndex)
        {
            if (!ModelState.IsValid)
            {
                return(Request.CreateResponse(HttpStatusCode.BadRequest, "Invalid data"));
            }

            IEnumerable <VehicleModelServ> vehicleModelServs = await VehicleModelService.Paging(pageSize, pageIndex);

            List <VehicleModel> vehicleModels = new List <VehicleModel>();

            vehicleModels = mapper.Map <IEnumerable <VehicleModelServ>, List <VehicleModel> >(vehicleModelServs);
            return(Request.CreateResponse(HttpStatusCode.OK, vehicleModels));
        }