public async Task <IActionResult> GetDiscounts([FromQuery] DiscountParams discountParams)
        {
            var discounts = await _repo.GetDiscounts(discountParams);

            var discountsToReturn = _mapper.Map <IEnumerable <DiscountReturnDTO> >(discounts);

            Response.AddPagination(discounts.CurrentPage, discounts.PageSize, discounts.TotalCount, discounts.TotalPages);

            return(Ok(discountsToReturn));
        }