Click credentials on sidebar. Create credentials, select OAuth Client ID.
When choosing scope, select email, profile, openid
After finishing first steps above, click to credentials, select create OAuth Client ID again. Choose web application, set authorized JS origins to http://localhost:...
Enable Google People Api in console to let server get those info
Geocoding API
Setup
Enable Geocoding API in console
Go to credentials tab and create a new API key.
Select Restrict key in API restrictions section. Choose Geocoding API in dropdown. Now save