in-app purchase blueprint

Hello amazing UE4 team

When are you planning to build a blueprint for in-app purchases?

We do have this already. There just isn’t any documentation for it yet. However, there is this forum post describing it:

-Pete

Well there’s another way of doing it as well.
and this seems quite easy and it’s free.

It’s a service called SDKBOX
you can find their documentation here.

http://docs.sdkbox.com/en/unreal/iap/

Can you help me out how to install it correctly? I created the sdkboxiap folder into engine/ plugins. But when i enable the plugin in my project and it restarts it tells me there are files missing.