senderUser property
SenderUser is the HANZO account subject that chat identity is linked to, resolved at ingest through the org's user link. Best-effort and omitted when absent: a person who never linked their chat account — or a link store that could not be read — leaves it empty and is never blocked for it.
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? senderUser;