How do I insert ANY custom information to user when a new user registers?
Specifically, I want to add a custom ID to new users called 'some-custom-id' upon registration. Not a field they could edit but for the backend functionality.
I tried dozens of ways, ChatGPT, stackoverflow etc and nothing works.
In addition, the documentation for the extension is EXTREMELY POOR. I mean what am I supposed to do with:
$data = apply_filters( 'rwmb_profile_insert_user_data', $data, $config );
I know you know what you meant but I'm not a warlock.
Give an example of actually using this, unless you want to torture us an watch us squirm, it's inhumanely little documentation.