The user may have been created all along, it is however not linked with your database, I can not tell when it was created, or if it ever was linked with the database.
I did a deeper check, and I noticed that you use your cPanel username as db user in the script config. Did you by any chance change the password for your account (which would change the cPanel password as well)? If you did you'll need to edit the configuration file to match up with your new password.
I'll check with the admins if they did change anything that would prevent the cPanel user to be used as db user as well.