linking netinfo database to UW IMAP

I guess I don't know what I missed. I have UW IMAP and Postfix installed and happy. I can telnet to them, the log files are finally happy. I just don't understand how to have users that have been given permission in the Workgroup Manager have permission to send/retreve emails. I can not find any information on any websites and the article here gets you to the point where it is set up but never goes any further on explaining how to permit users to use it. :D (At least I think it didn't) Thanks