Updated March 11, 2016
If you followed my steps to set up your WordPress site, this should already be taken care of. However, it’s worth checking to make sure your site does not have an Admin username.
Hackers have been known to utilize Admin accounts to break into WordPress sites so it’s important to address. Think of it like this: if a hacker wants to get into your site, they’ll need your username and password. Because they know “Admin” is the default username many people don’t bother to change, they’ll already be half way to their goal.