Our VPS Products do not come with a MySQL root user, as Plesk makes use of the user 'admin'. If you require granting privileges to your databases then you can do this by logging in as 'admin'.

On our Linux VPS packages you can do this by entering the following command:

mysql -uadmin -p`cat /etc/psa/.psa.shadow`

From this MySQL prompt you will be able to grant permissions and even add a root account if you desire.