Google OAuth API to get user's email address?

Question

I am playing with Google\'s OAuth 2.0 Playground using my own personal Google account, but I cannot seem to recover my Gmail address using the playground.

The scope

Answer 1

I came here looking why my server did not get email in response to /oauth2/v2/userinfo api call. It was only once that I saw this & it has been working well in past.

The answer gave good lead. While fixing this, there were several other resources that helped. Still I am not sure whether expecting always email in the response is ok. so - put error handling in code in case emails are not returned.

1. Google api documentation about migrating to google+ signin.
2. https://www.googleapis.com/auth/userinfo.email scope
3. People resource documentation
4. Add google+ api to the project using google developer console. The complimentary (quota) of calls is quite high (20m for google+ signin api per day).
5. Add error handling & logging in server code in case api returns no emails. In my case, I was looking only type='account' email.