Additional Fields : Specify additional fields to include on this issue as JSON. For example, you may associate an assignee or label here. See the docs (https://studio.apollographql.com/public/Linear-API/schema/reference/objects/Issue?variant=current) for available fields. (example: "{
assigneeId: "a70bdf0f-530a-4887-857d-46151b52b47c",
labelIds: ["a70bdf0f-530a-4887-857d-46151b52b47c"]
}")