Hello MPGH I need some quick help

I and thekman are making a hack for this forum, one public and one some what- vip. The vip one will be free but they will have to register on our forum, the other one will be released on this forum. Now the question is. We have IP.Board and we wan't to use the sql server on it instead of making a hole new sql database, we want to use the api service. How would we do that? What plugin do we have to download?

This is the built in api:

So the question is what function do we use to connect to the api so users can use their forum password and username to login to the vip hack.

Thanks for your time and help! I hope someone can help us out!

Have a nice/great day! and a happy summer.