[Zope] how to capture a password

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