Require A Password When Viewing A Livestream - Media Server 5

I am testing out Adobe Media Server Starter 5, and creating a livestream using Flash Media Live Encoder 3.2. I believe I have everything working right now, by embeding the video in a webpage and I can see the livestream just fine.

What I would like is to know how to require a password to VIEW the livestream.

ex: I setup a livestream I only want 3 clients to be able to view. When they bring up the webpage they cannot view the video until they enter a username or password.

Embeding the video in a webpage is not required (I am happy to use another method if required to achieve the authentication option).