public IActionResult GetOrderItems(int orderId)
        {
            try
            {
                var order = _repo.getOrder(orderId);
                if (order == null)
                {
                    return(BadRequest("Invalid Order"));
                }

                var orderItems = _repo.getOrderItems(orderId);
                return(Ok(Mapper.Map <IEnumerable <OrderItemDto> >(orderItems)));
            }
            catch (Exception ex)
            {
                return(StatusCode(500, ex.Message));
            }
        }