private IEnumerator GetAccountByUserID(string userID, Result <AccountInfo> result)
{
Result <StorageAccountInfo> r = new Result <StorageAccountInfo>(this);
yield return(StartCoroutine(storage.GetAccountByUserID(userID, r)));
var storageUser = r.Value;
result.SetValue(new AccountInfo(storageUser.userID, storageUser.userName, storageUser.data));
}