public IActionResult AppCaptcha(ProductViewModel model)
        {
            try
            {
                if (!CaptchaHelper.IsValidCaptcha(model.CaptchaToken, model.CaptchaId, model.CaptchaText))
                {
                    model.Message = "Please enter the security code as a number.";
                    return(View(model));
                }

                model.Message = "Successfully.";
                return(View(model));
            }
            catch (Exception)
            {
                model.Message = "Failed.";
                return(View(model));
            }
        }