private void changeCredit(string objectId, int addCredit)
{
_User user = userbll.QuerySingleById(objectId);
userbll.UpdateById(objectId, new Dictionary <string, Object>()
{
{ "credit", user.credit + addCredit },
});
CreditsHistoryBLL chBll = new CreditsHistoryBLL();
chBll.Insert(new CreditsHistory()
{
objectId = Guid.NewGuid().ToString(),
createdAt = DateTime.Now,
updatedAt = DateTime.Now,
userId = user.objectId,
type = 0,
change = addCredit,
credit = user.credit + addCredit
});
}