The cashier id submitting the transaction.
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "Operator", "description": "The cashier id submitting the transaction.", "$id": "https://raw.githubusercontent.com/api-evangelist/restaurant-brands/refs/heads/main/json-schema/channel-operator-schema.json", "type": "string", "example": "ninja123" }