You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'Password'' at line 1 code example
Example: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'privilleges to
GRANT ALL PRIVILEGES ON * . * TO 'wordpressuser'@'localhost';