public IActionResult Send2FA(TwoFactorAuth model)
        {
            TwoFactorAuthenticator TwoFacAuth = new TwoFactorAuthenticator();
            string UserUniqueKey = TempData["UserUniqueKey"].ToString();
            bool   isValid       = TwoFacAuth.ValidateTwoFactorPIN(UserUniqueKey, model.CodeDigit.ToString());

            if (isValid)
            {
                HttpContext.Session.SetString("IsValidTwoFactorAuthentication", "true");
                HttpContext.Session.SetString("LoginID", TempData["LoginID"].ToString());
                HttpContext.Session.SetString("LoginEmail", TempData["LoginEmail"].ToString());
                User userLoggedIn = _context.GetUser(Convert.ToInt32(HttpContext.Session.GetString("LoginID")));
                _context.LogAction("2 Factor Authentication", "Authentication successful.", userLoggedIn);
                if (userLoggedIn.UserRole == "Admin")
                {
                    HttpContext.Session.SetString("AdminValidity", "Admin");
                }
                else if (userLoggedIn.UserRole == "Super Admin")
                {
                    HttpContext.Session.SetString("AdminValidity", "Super Admin");
                }
                if (userLoggedIn.Authenticated == false)
                {
                    _context.SetUserAsAuthenticated(HttpContext.Session.GetString("LoginEmail"));
                }

                return(RedirectToAction("Profile", "Users"));
            }
            else
            {
                ViewBag.Message = "Invalid code entered, please try again.";
                string email = TempData["LoginEmail"].ToString();
                TempData["LoginEmail"]    = email;
                UserUniqueKey             = (email + GoogleAuthKey);
                TempData["UserUniqueKey"] = UserUniqueKey; //Session
                User userLoggingIn = _context.GetUserByEmail(email);
                _context.LogAction("2 Factor Authentication", "Authentication failure. Invalid code entered.", userLoggingIn);
                return(View("Send2FA"));
            }
        }