sander.scheer

You can put the following code in the plugin’s functions.php file:

function uwcs_modify_user_table( $column ) {
    $column['credits'] = 'Credits';

    return $column;
}
add_filter( 'manage_users_columns', 'uwcs_modify_user_table' );

function uwcs_modify_user_table_row( $val, $column_name, $user_id ) {
    $hasBalance = round(get_user_meta($user_id, '_uw_balance', true),0);

    switch ($column_name) {
        case 'credits' :
            return $hasBalance;
            break;

        default:
    }

    return $return;
}

add_filter( 'manage_users_custom_column', 'uwcs_modify_user_table_row', 10, 3 );