I have code to register a user from one of the blogs in WP Multi site:

if($userId = wp_create_user($email, $pass, $email)){
    var_dump(get_user_by_email($email));
}

The problem is that I want them to be registered NOT for the current site, but for the root site of the network.

I know I can use remove_user_from_blog, but it seems like a double work. Is there a way to register a user without attaching them to specific blog ?