In Device > Users > Local Users and Groups, you can configure user settings.
name@domain.com
DOMAIN\name (Windows)
name.domain (Novell)
Automatic (From LDAP Schema)
In Inactivity Timeout (days) enter the time in days to terminate if a user session is idle for certain amount of time.
Select Prune inactive user accounts after timeout to delete an inactive user account that is configured with a limited lifetime after the lifetime expires.
Click Accept.