Google Maps API
To create your Google Maps API keys:
Go to https://cloud.google.com/maps-platform/
Then click on;

on the upper right and follow the billing part.
Once done, Create or select a project:

Create a billing account if you don’t have one (this is mandatory):

The account is automatically restricted to the free trial $300 limit:

Once you have filled the billing form, hit the “Start my free trial” button.
Select the 3 options and click on Next:

Answer the questions and click on Next:

Enable your API key:

Copy your API key and click on API Console to set the restrictions:

In Key Restrictions > API restrictions, select “Restrict key” and select the following APIs:

Save and you’re all set!
Now you just have to copy and paste your API key in your editor in Settings > APIs:
(this one is used by the app):

and in your backoffice in Settings > APIs
(this one is used by the editor and backoffice functionalities)