def get_watchlist_ttl(self, item: str) -> int:
        """
        Get the amount of time a specific item will remain on the watchlist.

        :param str item: The item to get the TTL for on the watchlist
        :return: Time in seconds. Returns None for a non-existing element
        :rtype: int
        """
        assert item is not None
        item = self._encode_item(item)
        return self.__get_ttl(self.__redis_conf['watchlist_template'].format(item))