reply LINE bot

コード.gs

let channel_token = "Your access token"
let url = "https://api.line.me/v2/bot/message/reply"
 
function doPost(e) {
  let json = e.postData.contents
  let events = JSON.parse(json).events;
  
  events.forEach(function(event) {
    if(event.type == "follow") {
      follow(event);
    } 
 });
}
 
function follow(e) {
  let message = {
    "replyToken" : e.replyToken,
    "messages" : [{
        "type": "text",
        "text" : "フォローありがとうございます。毎月25日に家賃の支払いをリマインドします。"
      }]};
  let options = {
    "method" : "post",
    "headers" : {
      "Content-Type" : "application/json",
      "Authorization" : "Bearer " + channel_token
    },
    "payload" : JSON.stringify(message)
  };
  UrlFetchApp.fetch(url, options);
}