As I understand, App Engine Apps are OAuth 1 providers by default.
Is there a way to use OAuth2, e.g. with Google+ Sign-In or (mobile) chrome.identity API while still taking advantage of the GAE Users API and not having to implement a custom provider?
If not possible, what are the alternatives?
分享 Cloud Endpoints seem to be exactly the solution I need. They are not (yet?) a part of the official GAE for Go documentation, but can be found at Github.
Probably the best way to start is the examplary tictactoe app.
A quick test with the Google+ Sign-In button was successful (although with my probably wrong config it is performing multiple calls under the hood and some of them resulting in scoping errors).
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