code: def create_from_str(name_and_zone: str):
          
          if _NAME_ZONE_SEGREGATOR not in name_and_zone:
              raise ValueError("User's zone not set")
          name, zone = name_and_zone.split(_NAME_ZONE_SEGREGATOR)
          if len(name) == 0:
              raise ValueError("User's name cannot be blank")
          if len(zone) == 0:
              raise ValueError("User's zone cannot be blank")
          return User(name, zone)
docs: Factory method for creating a user from a string in the form `name#zone`.
          :param name_and_zone: the user's name followed by hash followed by the user's zone
          :return: the created user