How to change Service widget icons?(Solved!)

Update: I figured it out. Wasn’t really highlighted how you do it, but I figured it out. Not sure how to delete or close this post though.

Says something like this,

“Icon name, for example: icon-search
List of all avaialable icons and their names can be found at FontAwesome.”

I go to Fontawesome, try to add them into the area it suggests for the icons and they don’t work. Do I have to download a list of icons from somewhere to get them to work?

fa-adjust for example I typed in and it simply just doesn’t show up. This is probably something easy i’m over-looking, but in fairness I am following exactly what it’s telling me to do.