code: def main(cfg) -> None:
      demo = RetroDemoWebApp(
          cfg.text_service_ip,
          cfg.text_service_port,
          cfg.combo_service_ip,
          cfg.combo_service_port,
      )
      demo.run_demo(cfg.share, cfg.username, cfg.password, cfg.port)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main(cfg) without return types