This demo assumes you've already logged in to cPanel, and are starting on the home screen.
Now let's learn how to assign a user to a database.
Click the "MySQL Databases" icon.
Under "Add User To Database", select the user you want to add, and then select the database you want to add it to.
When ready, click "Add".
Select the privileges you want to grant the user... in this case, let's select "All Privileges".
Then click "Make Changes".
That's it! The user has been assigned to the database.
You can see the user assigned to the database in the table of databases.