To get started, go to your database management, for example, phpmyadmin.
Make a new database, be sure to remember the name of it
Open your new database, make a table called "users" with 3 fields.
The name is id, the type is INT. Mark it as primary, and Auto Increment
The name is user_name, it's type is Varchar, enter a length of 255.
The name is password, it's type Varchar, enter a length of 255.
Once saved, click on "insert data"
Leave the field id empty, the field user_name with your prefered username.
For the password, go here and enter md5("pass"); where pass is your prefered password.
Copy the output and paste it in the password field.
Save it, and you are done with the database, now, go Back and click "Configuration"