How to extract users info from ZODB?

Respected Sir/Madam,

I am Smita Kamdar.

I am using zope of the below specifications -

Zope Version   (Zope 2.6.2 (binary release, python 2.1, linux2-x86),
python 2.1.3, linux2)

Python Version 2.1.3 (#3, Dec 13 2003, 05:04:19) [GCC 3.3.2 20031022
(Red Hat Linux 3.3.2-1)]

System Platform linux2


I support an application developed & deployed on zope server. There
are some users who are using that application. I want the details of
those
users. How do I extract those details from zope?

Also, my application is using Postgresql Database. I checked all the
database tables by connecting to the DB from my linux server. But none
of the tables has user info. I think the user info is in the Zope Object
Database. How do I extract the users info from ZODB?

Request you to please help me here, as I am new to zope. Please help me.

Thanks & Regards,
Smita kamdar