Home APIs error: User canceled permissions flow

[GoogleDeveloper]

I’m receiving “User canceled permissions flow.” during sign-in to my app, what’s wrong?

[GoogleDeveloper · Accepted solution]

This error indicates a manual cancellation action by a developer, or an unmet condition during the authentication flow (such as the network being down). Each application calling the Home APIs must complete OAuth registration from the Google Cloud console as described in the developer guide. Accounts using the APIs must be registered as test users as described, and the apps need to be signed with appropriate keys.