Setting up INN to handle user logins

[John Levine]

I'm moving my INN server from an old BSD/OS box (yes, there are still
a few of them) to FreeBSD.

A few people connect to the nntp server from random places on the net
and log in with a user and password.  In the old version on BSD/OS the
logins and passwords are in a text file, but in the current version
that part has been rewritten so it's got a zillion wonderful options,
none of which I appear to want. 

Does anyone have a current INN config I could steal that does this?
In case it's not clear, these logins are unrelated to the /etc/passwd
ones, they're just for news.  TIA.