reader

record reader {
  action: option​<string>,
  device-sw-version: option​<string>,
  device-type: get-terminal-readers-device-type-enum,
  id: string,
  ip-address: option​<string>,
  label: string,
  livemode: bool,
  location: option​<string>,
  metadata: reader-metadata,
  object: reader-object-enum,
  serial-number: string,
  status: option​<string>,
}