I'm trying to implement Facebook login in our steam build, which means no Gameroom. From what I can find, there's no SDK for this use case. Right now it looks like the best way forward is to use the steam overlay browser, host a static website for redirecting from the Facebook login page, and have the static site make a rest call to our servers to get the access token. Unfortunately it doesn't seem possible to get the uri parameters from the overlay browser, which means I can't use the embedded login flow. The last option would be to get an embedded browser plugin, which would allow us to follow the embedded login flow, but I'd like to avoid that if possible. Has anyone solved this use case? Any advice you share?