public async Task <IActionResult> GetDiscount(int id)
        {
            var discountFroRepo = await _repo.GetDiscount(id);

            var post = _mapper.Map <DiscountReturnDTO>(discountFroRepo);

            if ((discountFroRepo == null))
            {
                return(NotFound());
            }
            return(Ok(discountFroRepo));
        }