2019-12-14 UTC
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[dmitshur] some prior related examples. Apple recently shipped https://developer.apple.com/sign-in-with-apple/, and look at how the "Sign in via Apple" button has a recognizable Apple logo - https://user-images.githubusercontent.com/1924134/70855115-4ed79b00-1e93-11ea-9e67-5039f6fe1bd9.png