Optional Apple Game Center Config
String value used to associate a client session with an Id token, and to mitigate replay attacks. If this field is provided, the nonce claim in response Id token will have a matching value.
Optional Oculus Config
Optional Sign In Only
Whether the API should only attempt to sign-in and do not create a new player if the player does not exist.
Optional Steam Config
External token that can be verified to represent a player from the id provider. This may be an id token or an access token.