code: @CommandArgument
    public void start() {
      System.out.println("Starting hub");
      try {
  
        Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
        EmbeddedDataSource ds = new EmbeddedDataSource();
        ds.setConnectionAttributes("create=true");
        ds.setDatabaseName("classes");
  
        JobHub.prepareDataSource(ds);
  
        logger.info("Initializing service");
        jobHub = new JobHub(ds);
        AuthenticationServer authServer = new AuthenticationServer(jobHub, JdcpUtil.DEFAULT_PORT);
  
        logger.info("Binding service");
        Registry registry = getRegistry();
        registry.bind("AuthenticationService", authServer);
  
        logger.info("Hub ready");
        System.out.println("Hub started");
  
      } catch (Exception e) {
        System.err.println("Failed to start hub");
        logger.error("Failed to start hub", e);
      }
    }
docs: Starts the hub.