public async Task <ActionResult> Bet(int?auctionId, decimal betValue)
        {
            if (auctionId == null || auctionId < 1)
            {
                return(RedirectToAction("Index", "Home"));
            }

            if (betValue <= 0)
            {
                ModelState.AddModelError("betValue", "Bet value can't be negative.");
            }

            if (ModelState.IsValid)
            {
                if (await bidService.PlaceBet((int)auctionId, User.Identity.Name, betValue))
                {
                    return(RedirectToAction("Details", new { id = auctionId }));
                }
                else
                {
                    return(RedirectToAction("Details", new { id = auctionId }));
                }
            }

            TempData["ViewData"] = ViewData;
            return(RedirectToAction("Details", new { id = auctionId }));
        }