See: https://core.telegram.org/bots/api#getuserprofilephotos

def getUserProfilePhotos(self, user_id,
                             offset=None,
                             limit=None):
        """ See: https://core.telegram.org/bots/api#getuserprofilephotos """
        p = _strip(locals())
        return self._api_request('getUserProfilePhotos', _rectify(p))