Newsportal doesn't include a system that allows users to register
themselves, to control access to newsgroups for users, to give users
administration-rights (moderators), and so on.

But newsportal provides an interface to give it access to external
user-databases. 

So, if you already have a user-database, and a login-system, you can use
the information in this database to limit access to your newsportal
installation:

1. fill out the functions in regapi.inc.php. They should be
   self-explaining
2. copy regapi.inc.php in the lib-directory, under your newsportal
   installation directory
3. activate it in your config.inc.php ($npreg_lib)
4. make sure, if you use a mysql-database for example, that you connect
   to your database. You can add the mysql_connect() at the top or bottom
   of regapi.inc.php, or head.inc for example

