If your hosting provider supplies the cPanel hosting control panel, you may follow these simple instructions to create your WordPress username and database. A more complete set of instructions for using cPanel to create the database and user can be found in Using cPanel.
1. Log in to your cPanel.
2. Click MySQL Database Wizard icon under the Databases section.
3. In Step 1. Create a Database enter the database name and click Next Step.
4. In Step 2. Create Database Users enter the database user name and the password. Make sure to use a strong password. Click Create User.
5. In Step 3. Add User to Database click the All Privileges checkbox and click Next Step.
6. In Step 4. Complete the task note the database name and user. Write down the values of hostname, username, databasename, and the password you chose. (Note that hostname will usually be localhost.)