WordPress get the child pages of current page

<?php 
$current_page_id = get_the_ID();
wp_list_pages("child_of={$current_page_id}&sort_column=menu_order&title_li="); ?>

Please check the above code

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)