'Initialize `user_id` and `key`; set `secure` to an ``int`` based on
passed value.'

def __init__(self, key, secure=True, host=None, port=None, url=None, timeout=None, proxy_url=None, backoff=None, retry_delay=None):

    super(ConnectionKey, self).__init__(secure=secure, host=host, port=port, url=url, timeout=timeout, proxy_url=proxy_url, backoff=backoff, retry_delay=retry_delay)
    self.key = key
