firebase data connect & expressjs - firebase admin

app.js

const express = require('express');
const app = express();
const serviceAccount = require([path/file_name.json]); /// Firebase -> 프로젝트 설정 -> 서비스 계정 -> 비공개 키 생성
const admin = require('firebase-admin');
const { getDataConnect } = require('firebase-admin/data-connect');
const firebaseApp = admin.initializeApp({credential: admin.credential.cert(serviceAccount)});
const serviceId = "[Connect-ServiceID]"; // 영상 내 확인
const location = "[LOCATION]"; // 영상 내 확인
const dataConnect = getDataConnect({serviceId,location});

app.listen(8000);
app.get("/", async (req,res) => {
    const query = `query {
        users {
            id
            uid
            name
            address
        }
    }`;
    const connectData = await dataConnect.executeGraphqlRead(query);
    res.json({connectData});
});