Have you ever tried to change your WordPress username just to find out that it cannot be changed?
Note: To all users if this sounds scary, don’t worry. We will guide you step by step, so you don’t get lost.
First thing you need to do is login to your cPanel. Scroll down to the databases section and click on phpMyAdmin.
Next you need to select the database that your blog is hosted in.
Click on the table wp_users on the left hand side. Then click edit on the username that you want to edit.
Hit the Go button and you are done.
Go back to your site and login with your new username.