Hello good afternoon.

I need help because I can not solve it.
Some time ago I installed wpforo, here: https://www.despachoceltics.com/foro-boston-celtics/

But having changed the theme, the design of the web, right now, although the whole base of the forum is maintained, and I've been looking at its configurations all day; I do not know, I can not find how I did or how to make the button for the login, for the registration, etc ... of the users for the forum.

I have looked at documentation, I searched, but I do not find anything clear.

How to do?

I need to insert the login button, register, all necessary.

Thank you.