[Zope] how to capture a password

[Cornelis J. de Brabander]

I have a zope powered site that uses basic authentication. In addition to
the acl_users folder I have a database with user information, like name data
and email address. Within this setup I want to give the user the opportunity
to have his/her password sent by email in case (s)he has forgotten. How can
I solve this problem within the current setup. I can't find a method that
delivers a user's password and I fear it does not exist.
Cornelis J. de Brabander