所以在創建“點”類時，我找到了用戶并用 100（num 值）更新了它的點，但我一直在意外地收到 referuserRef 這是我的代碼const functions = require('firebase-functions');      const admin = require('firebase-admin');    admin.initializeApp();exports.pointsCreated = functions.firestore        .document('points/{pointsid}')        .onCreate((snap, context) => {                        const newValue = snap.data();            if (newValue['type'] !== null) {                if (newValue['type'] === 'refer') {                    const referuserRef = admin.firestore().collection('users').doc(newValue['user']); //this is where i get the error                    console.log("referuserRef");                    console.log(referuserRef);                    const referuserDoc = await referuserRef.get()                    if (referuserDoc.exists) {                        referuserRef.set({ points: Number(referuserDoc.data()['points']) + 100 }, { merge: true });                    }                }            }        });這是 package.json 和 .eslintrc.json 有“ecmaVersion”：7（我也試過 8，但每次我嘗試時它都給了我同樣的錯誤{  "name": "functions",  "description": "Cloud Functions for Firebase",  "scripts": {    "lint": "eslint .",    "serve": "firebase emulators:start --only functions",    "shell": "firebase functions:shell",    "start": "npm run shell",    "deploy": "firebase deploy --only functions",    "logs": "firebase functions:log"  },  "engines": {    "node": "10"  },  "main": "index.js",  "dependencies": {    "firebase-admin": "^8.10.0",    "firebase-functions": "^3.6.1"  },  "devDependencies": {    "eslint": "^5.12.0",    "eslint-plugin-promise": "^4.0.1",    "firebase-functions-test": "^0.2.0"  },  "private": true}