gasでpostで受け取ったjsonをパース

function doPost(e) {
  var reqJson = e.postData.getDataAsString()
  var jsonObj = JSON.parse(reqJson)

  var newRow = getUserData(jsonObj)
  var sheet = SpreadsheetApp.getActive().getActiveSheet()
  sheet.appendRow(newRow)
}

function getUserData(obj){
  // gasじゃこの記法は未対応
  //let {id, 'user':{name,age,email,result}} = obj
  var id = obj.id;
  var name = obj.user.name;
  var age = obj.user.age;
  var email = obj.user.email;
  var result = obj.user.result;
  var newRow = [id,name,age,email,result]
  return newRow
}