def __init__(self, token=None, **kwargs):
        super(ServicePushbullet, self).__init__(token, **kwargs)
        self.AUTH_URL = 'https://pushbullet.com/authorize'
        self.ACC_TOKEN = 'https://pushbullet.com/access_token'
        self.REQ_TOKEN = 'https://api.pushbullet.com/oauth2/token'