public ActionResult <GetCategoryBookingResponse> GetBookingById(Guid id)
        {
            var booking = context.Bookings.Find(id);

            context.Entry(booking).Reference(b => b.Category).Load();
            if (booking == null)
            {
                return(NotFound());
            }

            GetCategoryBookingResponse response = mapper.Map <GetCategoryBookingResponse>(booking);

            response.Category = mapper.Map <GetMinCategoryResponse>(booking.Category);

            return(Ok(response));
        }