Once you are logged into your hosting control panel scroll to the Web Tools section and you'll be given three options for configuring and managing your databases:
The main option you will use here is the
MySQL Databases, this page will give you options to:
[list]
[*]Add a New MySQL Database
[*]Manage MySQL Databases
[*]Add Additional MySQL User
[*]Manage Additional MySQL Users
[/list]
Once you have created a database the Manage MySQL Databases section will give you the Server, Database/Username, the option to update the password, usage and the 'Manage' option to giving access to PHPMyAdmin: