Authenticate to an account using a password stored on a device and protected by the device's security which may be biometric, PIN, passcode or other enrolled device security.
On MacOS and iOS this uses the local keychain and the kSecAttrAccessControl attribute so that the user must confirm their presence using TouchID, FaceID or a PIN code when reading the password.
For other platforms this uses a combination of the local_auth package and the flutter_secure_storage package.
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