Wordpress generally do not allow you to change the default ‘admin‘ username, this is a big security issue as a hacker’s work is reduced to just brute force the password as he knows the username is always ‘admin‘.  Though, there is a workaround to change the password directly in the database. We will use phpmyadmin to alter the database. Just log in to you phpmyadmin account & select your wordpress database from the drop down menu on the left side. You will be presented with something like this…

On the right side, default wordpress tables are listed, just select ‘wp_users’ table & click browse. A new page will be shown.

Select the check box & click the pencil icon to edit the ‘user_login’ field

That’s all, change admin to whatever you like to have as a password & click go at the bottom. This is my way of changing the username, if you have any other method, than please share with us.