docs: def create_bag(dir_bag):
      """
      Create a Bag out of given files.
      :param str dir_bag: Directory that contains csv, jsonld, and changelog files.
      :return obj: Bag
      """
      logger_bagit.info("enter create_bag")
      # if not dir_bag:
      #     dir_bag = os.getcwd()
      try:
          bag = bagit.make_bag(dir_bag, {'Name': 'LiPD Project', 'Reference': 'www.lipds.net', 'DOI-Resolved': 'True'})
          logger_bagit.info("created bag")
          return bag
      except FileNotFoundError as e:
          print("Error: directory not found to create bagit")
          logger_bagit.debug("create_bag: FileNotFoundError: failed to create bagit, {}".format(e))
      except Exception as e:
          print("Error: failed to create bagit bag")
          logger_bagit.debug("create_bag: Exception: failed to create bag, {}".format(e))
      return None