1. Login to cPanel.
2. Locate and click on the "MySQL Databases" icon under the "Databases" category.
3. Locate the "Add User To Database" heading.
4. Select the user you want to add the database, and then select the database you want to add the user to.
5. Click "Add".
6. Select the privileges you want the user to have in the database (All privileges is OK for most applications).
7. Click "Make Changes".