You must connect to Google Developers Console to enable your API.
1. Create a new project
If this is the first time you have accessed Google Developers Console, you will need to create a new project that will be named "My Project".
You will need to tick the following two boxes :
- Decide if you want Google to email updates or not about Google APIs
- Accept the conditions of the Terms of Service.
Then click on Agree and continue
.