code: def enable(config, master, tags, accounts, debug, message, region):
      
      accounts_config, master_info, executor = guardian_init(
          config, debug, master, accounts, tags)
      regions = expand_regions(region)
      for r in regions:
          log.info("Processing Region:%s", r)
          enable_region(master_info, accounts_config, executor, message, r)
docs: enable guard duty on a set of accounts