'è¯Šæè¯·åè http://mp.weixin.qq.com/wiki/index.php?title=è·åå³æ³šèåè¡š
:param first_user_id: å¯éãç¬¬äžäžªæåçOPENIDïŒäžå¡«é»è®€ä»å€ŽåŒå§æå
:return: è¿åç JSON æ°æ®å'

def get_followers(self, first_user_id=None):

    params = {'access_token': self.token}
    if first_user_id:
        params['next_openid'] = first_user_id
    return self.get('https://api.weixin.qq.com/cgi-bin/user/get', params=params)
