Removing get_template_part in child theme

Copy the file to your child theme,

In your child theme, create a template and name it what ever you want, e.g content-child.php

Now you can replace lib/login/register.php with your new template:

<?php get_template_part( 'content-child', get_post_format() ); ?>

It should work.

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