Create A Forum - Support Forums

I use createaforum: themcdougalbugle.createaforum.com but I have another site with social features: themcdougalbugle.com where there are registered members, groups, comments on blogs/videos/photos etc. but I'm using createaforum.com's for forums, arcade, and chat. I wish to integrate the user systems so when they register on my site, they're automatically logged in/registered on the forums and when they log out, they're logged out of both. That way they don't have to do that stuff twice. I think I'd need an API key so I can generate authtokens so I could add them to the HTML pages on my site. It should be possible for their information to flock over through the different sites I have. Kind of like Youtube's social system is integrated with Google's.