我正在嘗試更新量角器 nodejs 中 JSON 文件的鍵值對。無法將“鍵”參數傳遞到“等于”運算符的左側以更新 JSON 文件中的值。請找到以下代碼并幫助我解決此問題：調用方法：this.test = async function () {await writeToJSON(title, test-name-07282020-1234);}方法：async function writeToJSON(key, value) {  const { readFile, writeFile } = require('fs').promises;  const jsonFilePath = `${__dirname}/testdata.json`;  let data = JSON.parse(await readFile(jsonFilePath));  data.LANG.TEST2.Default.key = value;  // line 5 ..due to key is not read from  // the parameter passed in the method. It is trying to look the field 'key' in   //json file to update the value.  writeFile(jsonFilePath, JSON.stringify(data, 2, 2)).then(() => {    console.log('Finished writing to json file')  })}測試數據.json：    {  "LANG": {    "TEST1": {      "Default": {        "username": "value1",          "password": "value2"      }    },    "TEST2": {      "Default": {        "username": "value1",          "password": "value2",            "title": "test-name-05252020-4786"      }    }  }它在第 5 行失敗我希望密鑰讀作“標題”并為其分配值“test-name-07282020-1234”。請在這里幫忙！