MySQL users cannot exist separately from MySQL databases. You must stick to the following sequence:

1. Create a database
2. Add MySQL users to each created database.

However, MySQL users can be shared by different databases.

To create a MySQL database, do the following:

1. Select MySQL in the Databases menu and a MySQL DB creation Wizard automatically appears.
2. On the form that shows enter the name of the database and database description if needed:
    

   

    3.  In the form that appears, create a new user or grant privileges to users of other databases:

• Add a new user to the database you have just created.  Click Add user.
• Choose roles for users of other databases so they can use your new database. Click Grant. 
   

   4.   Click Finish to complete creating your MySQL database.