A database is an application that manages data and allows fast storage and retrieval of that data by its users through queries.

Login in Plesk control panel with your E-mail ID and password.

Click on "Databases" under "Application & Services".

To create database click on "Add New Database" .

Give Database name and click "Ok".

To add user Click on "Add Database User" for the Database created.

Now Enter user name,give password,confirm password and click "Ok ".

Your database user has been added. You can continue adding  users through "Add New Database Users".

Logout after you finish.