HTTP Server: Basic Authentication and multiple users.

I'm using HTTP Server and Basic authentication for my application and I need to log-in at least two different users. The first user is the admin user and the second user is a normal user.

How can I implement this scenario with basic authentication without using the form based authentication model on KEIL RL-TCPnet HTTP Server library? Is there any way to define more than one user to the HTTP server library for basic authentication? Or can I interfere whit the original authentication sub routine from the library so I can log-in users from my list of users.

Thanks,
Erdinc.