Changes in my child theme from customizer not appearing in style.css?

If you mean the WordPress Customizer: These changes are not saved to the style.css, but they come most likely to be found shortly before </head>. Probably you will find there something like

<style>
//definitions via Customizer
</style>

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