Create a Google Maps Javascript API key

Go to https://developers.google.com/maps/documentation/javascript

Then click on on the upper right.

Then select “Create a new project”

Then you obtain your API key:

Click on the link “API Console”:

In the new window, for the Key restriction, select “None”.

Save and you’re all set!

Now you just have to copy and paste your API key in your editor in Settings > Advanced