Login page is redirecting to homepage

Update your DOMAIN site.

Put this in your wp-config.php file

define('WP_HOME','http://example.com');
define('WP_SITEURL','http://example.com');

Probably thats fix your problem.
Wherever, you can revert back to the Default Theme, renaming the folder of your current theme in /wp-content/themes/ directory.

Trying too deleting your .htaccess file

Regards.

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