[Zope] How do I tell when the last login was?

Hi I want to know when the last login of a Zopeuser was. I use the normal acl_users of Zope. Is there something similar to bobobase_modification_time? If not, where do I start to add such functionality? Thanx Oliver -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net GMX Tipp: Machen Sie Ihr Hobby zu Geld bei unserem Partner 1&1! http://profiseller.de/info/index.php3?ac=OM.PS.PS003K00596T0409a