How to use the @expo/commander.commands function in @expo/commander

const commandModule = require(`./${file}`);
        if (typeof commandModule === 'function') {
          commandModule(program);
        } else if (typeof commandModule.default === 'function') {
          commandModule.default(program);
        } else {
          console.error(`"${file}.js" is not a properly formatted command.`);
        }
      });

    program.parse(process.argv);

    const subCommandName = process.argv[2];
    const subCommand =
      subCommandName &&
      program.commands.find(({ _name, _aliases }) => {
        return _name === subCommandName || (_aliases && _aliases.includes(subCommandName));
      });

    if (!subCommand) {
      subCommandName &&
        console.log(
          chalk.bold.green(subCommandName),
          chalk.red('is not an expotools command. See below for the full list of commands.\n')
        );
      program.help();
    }
  } catch (e) {
    console.error(chalk.red(e));
    throw e;
  }
}