I have no idea how these servers work, but I found this while searching on the web.
This seems to be some code for SSO Authentication on Messenger Protocols 15+.
This was published in 2009, so it may work for WLM 2009 if you somehow implement this into your server emulator, however I don't know how any of this stuff works and I might be completely wrong.
I'm just trying to help at the end of the day
@Randel_Griffin @Dan97 @valtron (Valtron I tagged you because you're good at this stuff I guess xD)