private static void _removeTokenItemByToken(Guid?token)
{
String storageKey = token.ToString();
StoragePerApplication.Remove(storageKey);
}
private static void _removeTokenValueByUserIdAndAppId(long id, long appId)
{
String storageKey = _createStorageKeyFromUserIdAndAppId(id, appId);
StoragePerApplication.Remove(storageKey);
}