Hi,
You can create/add MySQL database with these following steps.
1) Login in to the DirectAdmin control panel at,
http://domain.com:2222/ (this is the default port for DirectAdmin access).
If you are Administrator, you could see the User Level in your right panel, if you are normal user, you could see the MySQL Databases icon there.
2) Click on MySQL Management, If you are Administrator.
3) Click Create a Database.
Then you can enter:
-) Database Name
-) Database Username
-) Database Password
After finish, press the Create Button.
Thank you,