Adding a user: To add a database user, type the user name, hostname and password then click the CREATE button. % (wildcard) may be used as a default for the hostname.
Removing a user: To remove a database user, click the user in question then click the DELETE button.
Once a database user is created, you will find permission settings at the bottom of that user's screen per database.
NOTE: The main user that is provided to you for your environment will not be listed here. This section is dedicated only for additional users. You may view the details for your main database and user under Mysql -> Info