[Zope] getting queries of a database into variables?

hi , I am try to setup a cookie based authorization system(learnt from my perl dyas). i dont know much of sql, so after reading thru ZSql guide, i could build up a list of my users login and passwords. If i query the database and test it the result get printed on screen. How do i put up queried data into variables so i can conditionally check them? Does there exist some readymade package for setting up cookie based authorization. i could locate someting called LoginManager, but how do i use it. Thanks for any clues.