Hi, I am trying to implement custom authentication in my WCF service.. Maybe I'm missing something, but I can't seem to figure out how everything goes together.

I am using netTcpBinding, and Callbacks, so AFAIK I only have to login once per reliable session..

For authentication, I am using UserNamePasswordValidator, to validate the username and password, which works fine, BUT, how can I find out which user logged in from my Service class (the one that implements the interface with the ServiceContract Attribute), when I call methods in that class ???