def METHOD_NAME(self, logger, config) -> Tuple[bool, any]:
    try:
        authenticator = TokenAuthenticator(token=config["api_key"], auth_header="Api-Key", auth_method="")
        list_gen = Lists(authenticator=authenticator).read_records(sync_mode=SyncMode.full_refresh)
        next(list_gen)
        return True, None
    except Exception as e:
        return False, f"Unable to connect to Iterable API with the provided credentials - {e}"