private async Task <IEnumerable <string> > GetOnlineUserNamesAsync()
{
var before = DateTime.UtcNow.AddMinutes(-5);
var ssonlineuser = await _repo.GetSSOnlineUsersAsync();
var query = from c in _accountingContext.Current
join cm in _accountingContext.CurrentMeta on c.TimeStamp equals cm.TimeStamp
where cm.TimeStamp > before
select c.UserName;
var currentUserNames = await query.ToArrayAsync();
return(currentUserNames.Concat(ssonlineuser));
}
