public async Task <IActionResult>  Post([FromBody] Promos item)
        {
            if (ModelState.IsValid)
            {
                await _context.AddAsync(item).ConfigureAwait(false);
                await _context.SaveChangesAsync().ConfigureAwait(false);
            }
            else
            {
                return BadRequest(ModelState);
            }

            //return Ok(item);
            return(Ok(new { message = "Promo successfully added." }));
        }