def server_status(self):
        with self.get("/v3/system/server_status") as res:
            code, body = res.status, res.read()
            if code != 200:
                return "Server is down (%d)" % (code,)
            js = self.checked_json(body, ["status"])
            status = js["status"]
            return status
TODO: add docstring
dataset/ETHPy150Open treasure-data/td-client-python/tdclient/server_status_api.py/ServerStatusAPI.server_status