private void CheckForRefresh(AuthenticationTicket token)
        {
            var currentUtc   = Clock.UtcNow;
            var expiresUtc   = token.Properties.ExpiresUtc;
            var allowRefresh = token.Properties.AllowRefresh ?? true;

            if (!allowRefresh)
            {
                return;
            }
            if (expiresUtc < currentUtc)
            {
                //_service.RefreshToken(ref token);
                StoreCookieToken(token.RetrieveToken());
            }
        }