actor property
Actor is the "org/sub" identity to record the session under, up to 256 characters. Omit it and the calling principal is used, which is almost always what you want: it is what a login revoke matches on to stop this session.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? actor;