Add a page (All Plug-Ins/HTML Code) in your project, set the folder as “/” so it goes to the same location as your homepage (index) file. I usually name this page htaccess.html
Add the following code (change YourSite to your actual domain). I say this only because I spent an hour trying to figure out why I couldn’t get something on my htaccess page to work, chatting back and forth with tech support 
only to realize my mistake. I immediately took two days off 
#Force non-www:
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www.YourSite.com [NC]
RewriteRule ^(.*)$ http://YourSite.com/$1 [L,R=301]
Log into your C-Panel and locate the htacess.html page and rename it to .htaccess and you should be all set. Or if you currently have a .htaccess page, add the lines of code.
You may have to change your settings in your C-Panel to view hidden (dot) files if you ever need to replace it.