Extra fields for wordpress user management in dashboard

I need to add extra fields to the Add new user and Edit user pages in wordpress admin dashboard.

I can add this to Edit user using the hook edit_user_profile. But how to add it in Add new user page?

Also I want to add some extra columns to the user wp list table.

add_action( 'edit_user_profile', 'my_show_extra_profile_fields' );

function my_show_extra_profile_fields( $user ) {

}

via Chebli Mohamed