[SOLVED] If USERNAME not required then name is copied to it

You mean username_userid? It just depends really. For example [username]_[user_id] would for example result in admin_62. If that's what you're wanting then yes the Field action will work fine.

Basically, yes. With a variation that I want to assign a constant string=“usuario_“ plus [user_id].

Then, should i enter in the value set for this to work: usuario_[user_id] ?

I am expecting for the USERNAME field to get results like:

usuario_63
usuario_64
usuario_65
...

Have tried and works¡¡¡

Tahnk you for the plugins.