def destroy(self, subid, ipaddr, params=None):
        ''' /v1/server/destroy_ipv4
        POST - account
        Removes a secondary IPv4 address from a server. Your server will be
        hard-restarted. We suggest halting the machine gracefully before
        removing IPs.

        Link: https://www.vultr.com/api/#server_destroy_ipv4
        '''
        params = update_params(params, {
            'SUBID': subid,
            'ip': ipaddr
        })
        return self.request('/v1/server/destroy_ipv4', params, 'POST')
/v1/server/destroy_ipv4
        POST - account
        Removes a secondary IPv4 address from a server. Your server will be
        hard-restarted. We suggest halting the machine gracefully before
        removing IPs.

        Link: https://www.vultr.com/api/#server_destroy_ipv4