Etsy OAuth 1.0 issues about apps-script-oauth1 HOT 9 CLOSED

var CONSUMER_KEY = '...';
var CONSUMER_SECRET = '...';
var SHOP_NAME = '...';

function onOpen(e) {
  SpreadsheetApp.getUi().createAddonMenu().addItem('Start', 'showSidebar').addToUi();
}

function onInstall(e) {
  onOpen(e);
}

function showSidebar() {
  var service = getService();
  if (service.hasAccess()) {
    var response = service.fetch('https://api.etsy.com/v2/shops/' + SHOP_NAME + '/transactions');
    var result = JSON.parse(response.getContentText());
    Logger.log(JSON.stringify(result, null, 2));

    var html = '<style>*{font-family:Arial;font-size:16px;line-height:1.5;}input,button{background:#fff;border:1px #000 solid;padding:10px;border-radius:5px;padding:4px 20px;}</style>'
    +'<b>Authorized</b><br/><a href="#" onClick="javascript:google.script.run.reset();return false">Reset</a>';
    
    var template = HtmlService.createTemplate(html);
    template.authorizationUrl = authorizationUrl;
    var page = template.evaluate();
    SpreadsheetApp.getUi().showSidebar(page);

  } else {
    var authorizationUrl = service.authorize();
    Logger.log('Open the following URL: %s', authorizationUrl);
    
    var callbackUrl = authorizationUrl.split('oauth_callback=');
    var decodedCallbackUrl = unescape(callbackUrl[1]);
    Logger.log(decodedCallbackUrl);
    
    var html = '<style>*{font-family:Arial;font-size:16px;line-height:1.5;}input,button{background:#fff;border:1px #000 solid;padding:10px;border-radius:5px;padding:4px 20px;}</style>'
    +'<b>Not yet authorized</b><br/><a href="<?= authorizationUrl ?>" target="_blank">Click here to login</a>, then enter verification code in the box below.<br/><br/>'
    +'<center><input type="text" size="10" style="text-align:center;" id="verCode" placeholder="Code" /> <button onClick="google.script.run.sendBackVerifier(\'' + decodedCallbackUrl + '&oauth_verifier=\' + document.getElementById(\'verCode\').value);">Verify</button></center>';
    
    var template = HtmlService.createTemplate(html);
    template.authorizationUrl = authorizationUrl;
    var page = template.evaluate();
    SpreadsheetApp.getUi().showSidebar(page);
    
  }
}

function sendBackVerifier(url) {
  Logger.log('sendBackVerifier: ' + url);
  var service = getService();
  var response = service.fetch(url); // Can't get this to run. But if I visit the URL manually, it'll run authCallback()
  HtmlService.createHtmlOutput('Success!');
}

/**
 * Reset the authorization state, so that it can be re-tested.
 */
function reset() {
  var service = getService();
  service.reset();
}

/**
 * Configures the service.
 */
function getService() {
  return OAuth1.createService('Etsy')
      .setRequestTokenUrl('https://openapi.etsy.com/v2/oauth/request_token?scope=transactions_r')
      .setAuthorizationUrl('https://www.etsy.com/oauth/signin')
      .setAccessTokenUrl('https://openapi.etsy.com/v2/oauth/access_token')
      .setOAuthVersion('1.0')
      .setConsumerKey(CONSUMER_KEY)
      .setConsumerSecret(CONSUMER_SECRET)
      .setCallbackFunction('authCallback')
      .setPropertyStore(PropertiesService.getUserProperties());
}

/**
 * Handles the OAuth2 callback.
 */
function authCallback(request) {
  Logger.log('authCallback called: ' + request);
  var service = getService();
  var authorized = service.handleCallback(request);
  if (authorized) {
    Logger.log('Success');
    return HtmlService.createHtmlOutput('Success!');
  } else {
    Logger.log('Denied');
    return HtmlService.createHtmlOutput('Denied');
  }
}

Open the following URL and re-run the script: undefined

Script function not found: doGet