Cannot login after moving website

I moved my WP installation to another server so the URL changed. I did change the URL after the fact through editing wp-config.php and adding

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

I also edited Edit functions.php by adding

update_option( 'siteurl', 'http://example.com' );
update_option( 'home', 'http://example.com' );

The site works, but problem is, that now when I try to login through example.com/wp-admin, the username/password combination is not being accepted. Naturally, I went into phpmyadmin to change the password for the username according to this: https://codex.ww.wp.xz.cn/Resetting_Your_Password#Through_phpMyAdmin
And… nothing. I still get the same message of incorrect password/username even after changing it several times.

I also tried this method: https://codex.ww.wp.xz.cn/Resetting_Your_Password#Through_FTP
with the same no-result.

Any ideas?