TOPIC: Google Maps Api

I have a question... I keep getting this error when trying to view any location.

Oops! Something went wrong.
This page didn't load Google Maps correctly. See the JavaScript console for technical details.

Apparently Websites that started using Google Maps on or after June 22, 2016 require an API key in order for maps to show.

So I generated an API Key at google maps... however how do I apply in dt_register... I don't see anywhere to plug it in.