Construct URL
        e.g.,: http://site2.enigmabridge.com:12000/1.0/testAPI/GetAllAPIKeys/abcdef012345

        :return:

def build_url(self):
        """
        Construct URL
        e.g.,: http://site2.enigmabridge.com:12000/1.0/testAPI/GetAllAPIKeys/abcdef012345

        :return:
        """
        url = "%s/1.0/%s/%s/%s" % (
            self.request.endpoint.get_url(),
            self.request.api_object,
            self.request.api_method,
            to_hex(self.request.nonce)
        )
        return url