With Google Apps Admin SDK Directory API, how can I get authenticated user id?

Question

I have an authenticated user and am able to query for a list of domain users using the google apis php client library.

However, it is unclear to me how I can retrieve the currently logged in user's user id. I tried using the my_customer alias which works for the list method, but when I try to do the plain GET request with user key as my_customer, it of course fails.

I know this must be something quite simple, but I cannot for the life of me find an answer in the documentation, so I'm pretty much reduced to guessing at this point.

Answer 1

For your app to work as Google Apps marketplace app, you must implement authentication using OAUTH2.

As a result you must have access to one of the following scopes which provide the APIs that get you the user Id :

• https://www.googleapis.com/auth/userinfo.profile (deprecated) : Gain read-only access to basic profile information, including a user identifier, name, profile photo, profile URL, country, language, timezone, and birthdate.

• https://www.googleapis.com/auth/plus.login : If using the userId value "me", this method requires authentication using a token that has been granted the OAuth scope https://www.googleapis.com/auth/plus.login or https://www.googleapis.com/auth/plus.me.