how do I set up ios Tapjoy ads?

I want to put ads in my IOS game, without a third party plugin (what I am using right now). I know that there is a ios tapjoy plugin, but I do not know how to set it up. I enabled it, restarted the editor, and add the default advertiser as tapjoy in the default engine ini file. What do I do now so they know who to pay? I need to get my account sdk key in somewhere, right?

Thank you for any help.

also interested if you found this out… would like to easily integrate tap joy to iOS unreal 5.