public async Task <PromoResponse> DeleteAsync(int id)
        {
            var existingPromo = await _promoRepository.FindById(id);

            if (existingPromo == null)
            {
                return(new PromoResponse("Promo not found"));
            }
            try
            {
                _promoRepository.Remove(existingPromo);
                await _unitOfWork.CompleteAsync();

                return(new PromoResponse(existingPromo));
            }
            catch (Exception ex)
            {
                return(new PromoResponse($"An error ocurred while deleting Promo: {ex.Message}"));
            }
        }