public void CleanUpExpiredSessions()
{
var cutOff = DateTime.UtcNow.Subtract(new TimeSpan(0, _settingsManager.Current.SessionLength, 0));
var expiredSessions = _userSessionRepository.GetAndDeleteExpiredSessions(cutOff);
foreach (var session in expiredSessions)
{
_securityLogService.CreateLogEntry(null, session.UserID, String.Empty, session.SessionID.ToString(), SecurityLogType.UserSessionEnd, session.LastTime);
}
}