WPMU Membership 2: Adding more column in member table

code.php

<?php
/**
 * Example: User ID
 */
 
add_filter( 'ms_helper_listtable_member_get_columns', function( $columns ) {

    $columns['user_id'] = 'User ID';

    return $columns;
}, 10, 1 );

add_filter( 'ms_helper_listtable_member_default_value', function( $html, $member, $column_name ) {

    return $column_name == 'user_id' ? $member->id : $html;

}, 10, 3 );