private static void _saveTokenItemByToken(Guid?token, TokenItem ti)
        {
            String storageKey = token.ToString();

            StoragePerApplication.Put(storageKey, ti);
        }
        private static void _saveTokenValueByUserIdAndAppId(long id, long appId, Guid?token)
        {
            String storageKey = _createStorageKeyFromUserIdAndAppId(id, appId);

            StoragePerApplication.Put(storageKey, token);
        }