title: google script Session.getActiveUser().getEmail() not working
body: <p>I've developed a web app with google script and code this in my gs.</p>
  
  <pre><code>var email = Session.getActiveUser().getEmail();
  Logger.log(email);
  // then do something to render the Email address on the page
  </code></pre>
  
  <p>After publishing the script, I log in with another account and execute the script.</p>
  
  <p>Then the page display this:</p>
  
  <p><strong>This application was created by another user, not by Google.</strong></p>
  
  <p><strong>This application has access to the following personal information: email address.</strong></p>
  
  <p>But still nothing in Log and the page display nothing.</p>
  
  <p>I just don't get it...</p>