curl --request GET \
  --url https://api.returnshelper.com/uat/public/api/UnknownShipmentStatus/getAllUnknownShipmentStatus \
  --header 'x-rr-apikey: <api-key>' \
  --header 'x-rr-apitoken: <api-key>'

{
  "unknownShipmentStatuses": [
    {
      "unknownShipmentStatusCode": "<string>",
      "unknownShipmentStatus": "<string>",
      "unknownShipmentStageDescription": "<string>"
    }
  ]
}