To create your Google Maps API keys:
Go to https://developers.google.com/maps/documentation/javascript
Then click on 
on the upper right.
Create or select a project:
Create a billing account if you don’t have one (this is mandatory):
The account is automatically restreint 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):
