A app allows websites to authenticate users using built-in authenticators such as Apple TouchID and Windows Hello or mobile device biometric sensor; 一个允许网站使用内置的认证器（如 Apple TouchID 和 Windows Hello 或移动设备的生物识别传感器）对用户进行身份认证的完整应用
Why do you think that https://github.com/corbado/flutter-passkeys is a good alternative to web-authn-completed-app