Retrieve IP addresses of recent visitors
        :param zone: the target domain
        :type zone: str
        :param hours: Past number of hours to query. Defaults to 24, maximum is 48.
        :type hours: int
        :param ip_class: Optional. Restrict the result set to a given class as given by:
            "r" -- regular
            "s" -- crawler
            "t" -- threat
        :type ip_class: str
        :param geo: Optional. Set to True to add longitude and latitude information to response
        :type geo: bool
        :return:
        :rtype: dict

def zone_ips(self, zone, hours=24, ip_class=None, geo=False):
        """
        Retrieve IP addresses of recent visitors
        :param zone: the target domain
        :type zone: str
        :param hours: Past number of hours to query. Defaults to 24, maximum is 48.
        :type hours: int
        :param ip_class: Optional. Restrict the result set to a given class as given by:
            "r" -- regular
            "s" -- crawler
            "t" -- threat
        :type ip_class: str
        :param geo: Optional. Set to True to add longitude and latitude information to response
        :type geo: bool
        :return:
        :rtype: dict
        """
        params = {
            'a': 'zone_ips',
            'z': zone,
            'hours': hours,
            'class': ip_class,
        }
        if geo:
            params['geo'] = geo
        return self._request(params)