[Zope] Authenticating with acl_users

[Sondre Rønjom]

Ive been looking through AccessControl/User.py to understand the 
validate() methods paramteres. Im not sure what to put inside the request, 
and how to do it. I have been testing around, but I can only manage to do 
authenticate(), but this only tells if the user is valid and has the right 
password. The thing is, I also want to set AUTHENTICATED_USER, but not 
sure how to to this, but I have the idea validate() does all this for you, 
if you pass the right parameters. I have been searching at zope.org and 
google.com for a long time now, but cant find very much useful. The only 
parameters I have put in the REQUEST are __ac_user and __ac_password, but 
I know I also need object value and physical container of the object, but 
dont know how to find this.

/Sondre