PHP Warning: mysqli_real_connect(): (HY000/1698): Access denied for user 'root'@'localhost' in /tmp/wordpress/wp-includes/wp-db.php on line 1653 code example

Example: mysqli_real_connect(): (HY000/1698): Access denied for user 'root'@'localhost'

ALTER USER 'root'@'localhost' IDENTIFIED BY 'mysql';