cp_authenticate.pl -- SWISH login management

This module provides basic login and password management facilities for SWISH. You can create an authenticated SWISH server by

1. Loading this library
2. Add one or more users to the passwd file using swish_add_user/3

   ?- swish_add_user("Bob", "Bob's secret", []).

As a result, trying to create the first pengine (e.g., using Run!), the server will challenge the user. The logged in user is available through pengine_user/1.