This action runs just after the registration form is submitted and the user is created on site and before joining any group.

 do_action('profile_magic_submit_data_before_join_group',$post,$files,$server,$gid,$fields,$user_id);

$post is an array of data associated with the user.

$files an array of files data to save for a user.

$gid is the group ID for which the registration form has been submitted.

$server is an array of data of a server’s details.

$fields is an array of field data associated with a group.

$user_id is the ID of the user that has just been created.