Using SHOUTcast
What's my username and password for the admin section of my server?
Use admin and the Admin password from Server settings to sign in to your server's admin page.
Use admin as the username. Find Admin password in Server settings in your VosCast account. This is the password for the server's admin page. Your account login and Broadcast password serve other purposes.

VosCast generates this password for you. Copy it as shown and keep it private.