[Zope] simple sql user auth

hi! is there a way of authenticating through sql, the simplest way? i dont need all stuuf from exUserFolder, no registration form, no password or details change, no mailing, nothing, just a SELECT user_id,password,roles FROM users WHERE user_id=xyz ... perhaps with a z sql query ... i tried to install loginmanager & zpatterns too, but it seemed to me that: = it is old code and perhaps deprecated too = everywhere zope 2.3 or 2.4 was mentioned, there were lots of errors with my 2.5.1 zope is there another way? thanks for the help, k