You need to have an account that's activated.
How to create the maps:
https://developers.google.com/maps/documentation/embed/guide#api_key
How to activate the API
https://code.google.com/apis/console/?noredirect&pli=1#project:814358246212:services

Technical notes, and other ideas.
You need to have an account that's activated.
How to create the maps:
https://developers.google.com/maps/documentation/embed/guide#api_key
How to activate the API
https://code.google.com/apis/console/?noredirect&pli=1#project:814358246212:services