title: how to fix Authorization error on google apps script?
body: <p>I am trying google apps script for the first time and running the below script from google apps script documentation</p>
  
  <pre><code>function createAndSendDocument() {
    // Create a new Google Doc named 'Hello, world!'
    var doc = DocumentApp.create('Hello, world!');
  
    // Access the body of the document, then add a paragraph.
    doc.getBody().appendParagraph('This document was created by Google Apps Script.');
  
    // Get the URL of the document.
    var url = doc.getUrl();
  
    // Get the email address of the active user - that's you.
    var email = Session.getActiveUser().getEmail();
  
    // Get the name of the document to use as an email subject line.
    var subject = doc.getName();
  
    // Append a new string to the "url" variable to use as an email body.
    var body = 'Link to your doc: ' + url;
  
    // Send yourself an email with a link to the document.
    GmailApp.sendEmail(email, subject, body);
  }
  </code></pre>
  
  <p>but when I run it I got an error Error: invalid_client when continuing to authorization required.</p>