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This well-known indicates for password manager, that passkeys are supported. source: https://android-developers.googleblog.com/2023/10/make-passkey-endpoints-well-known-url-part-of-your-passkey-implementation.html spec: https://github.com/ms-id-standards/MSIdentityStandardsExplainers/blob/main/PasskeyEndpointsWellKnownUrl/explainer.md