I'd like, if it's possible, to add a filter in the register_user() right after the $userdata array and before the wp_insert_user() call.
This would help the customization of the user variables (display_name, nickname, username etc) before the user is actually registered.
I've already added the filter using:
$userdata = apply_filters( 'awd_register_userdata', $userdata );
but each time i upgrade the plugin i have to re-apply the filter in register_user() function.