curl --request GET \
  --url https://{gatewayBaseURL}/batches \
  --header 'Authorization: Bearer <token>'

{
  "object": "<string>",
  "data": [
    {
      "id": "<string>",
      "object": "<string>",
      "endpoint": "<string>",
      "errors": {
        "object": "<string>",
        "data": [
          {
            "code": "<string>",
            "message": "<string>",
            "param": "<string>",
            "line": 123
          }
        ]
      },
      "input_file_id": "<string>",
      "completion_window": "<string>",
      "status": "<string>",
      "output_file_id": "<string>",
      "error_file_id": "<string>",
      "created_at": 123,
      "in_progress_at": 123,
      "expires_at": 123,
      "finalizing_at": 123,
      "completed_at": 123,
      "failed_at": 123,
      "expired_at": 123,
      "cancelling_at": 123,
      "cancelled_at": 123,
      "request_counts": {
        "total": 123,
        "completed": 123,
        "failed": 123
      },
      "metadata": "<unknown>"
    }
  ],
  "first_id": "<string>",
  "last_id": "<string>",
  "has_more": true
}