docs: def get_string(self, key, optional=False):
          """
          Tries to fetch a variable from the config and expects it to be a string
          :param key: The variable to search for in a possible list of configs
          :param optional: Whether to raise ConfigKeyNotFoundError if key was not found.
          :return: str string
          """
          return self._get_typed_value(key, str, lambda x: str(x), optional)