You can change WordPress default Admin Username and you should definitely do. Why? Security reasons. If someone is trying to break in and enter your blog admin and if your Username is Admin, his half job is done. Do not try this unless you are comfortable with PHPMyAdmin and MySQL. If not, ask someone to do it for you. From WordPress Admin you can not change the Username (though, I wonder why?). First for precaution measures, get Back up of your whole database before doing it.
Why Changing WordPress Admin User Name?
One common security vulnerability in WordPress is User Enumeration, in which an attacker enumerates a valid WordPress user account in order to launch brute force (password guessing) attacks. In order to help discourage this type of attack, you should change your admin username to something harder to guess.
Change your Admin Username
- Open your web host’s MySQL administration tool (probably phpmyadmin) and browse to your WordPress database.
- Locate the users table, in which you will find a user_login column.
- One of the rows will have admin in the field.
- Change this to something else by editing that row.
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