public IActionResult Post([FromBody] Sale sale)
        {
            if (ModelState.IsValid)
            {
                //string uniqueNumber = String.Format("{0:d9}", (DateTime.Now.Ticks / 10) % 1000000000);



                bool isAdded = _SaleManager.Add(sale);

                if (isAdded)
                {
                    return(Ok(sale));
                }

                return(BadRequest(new { error = "Failed to Add!" }));
            }

            return(BadRequest(new { error = "Model Sate is Not Valid! " }));
        }