def main():
    for ua in UserAuth.where():
        print ua.id, ua.expire_time
        data = dict(
                client_id = CLIENT_ID,
                client_secret = CLIENT_SECRET,
                refresh_token = ua.refresh_token,
                grant_type = GRANT_TYPE,
                )
        data = urllib.urlencode(data)
        t = requests.post(REFRESH_API, data)
        print t.content