使用ux_mode时获取用户信息：使用自定义图片进行Google登录时使用“重定向”

Question

我想使用 ux_mode：redirect 而不是默认的 popup 方法来使用javascript登录google。当前登录发生在下面，

 Dim currentMonth As Integer
        Dim yearMonthAgo As Integer ' if today is January then it will be previous year
        Dim previousMonth As Integer
        previousMonth = DatePart(DateInterval.Month, DateAdd(DateInterval.Month, -1, Today))
        yearMonthAgo = DatePart(DateInterval.Year, DateAdd(DateInterval.Month, -1, Today))
        currentMonth = DatePart(DateInterval.Month, DateAdd(DateInterval.Month, 0, Today))

        Response.Write("First day of previous month is: " & DateAdd(DateInterval.Day, 0, DateValue(previousMonth.ToString & "/1/" & yearMonthAgo.ToString())))
        Response.Write("<br />")
        Response.Write("Last day of previous month is: " & DateAdd(DateInterval.Day, -1, DateValue(currentMonth.ToString & "/1/" & yearMonthAgo.ToString())))

其中 glogin 是我用于Google登录的img的ID。

<script src="https://apis.google.com/js/platform.js?onload=onLoadGoogleCallback" async defer></script>


<script>
function onLoadGoogleCallback(){

   element = document.getElementById('glogin');

   //console.log(element);

    gapi.load('auth2', function() {
      auth2 = gapi.auth2.init({
        client_id: 'CLIENT_ID.apps.googleusercontent.com',
        cookiepolicy: 'single_host_origin',
         scope: 'profile',
        //ux_mode : 'redirect'
      });

     auth2.attachClickHandler(element, {},
       function(googleUser) {
           console.log('Signed in: ' + googleUser.getBasicProfile().getName());
           var profile = googleUser.getBasicProfile();
           console.log('Name: ' + profile.getName());
           console.log('Image URL: ' + profile.getImageUrl());
           console.log('Email: ' + profile.getEmail());
         }, 
         function(error) {
           console.log('Sign-in error', error);
         }
       );
    });



}
</script>

这工作正常，我正在控制台中获取信息。但是，如果我尝试使用重定向方法，控制台中将不会显示任何内容。登录后我该如何使用 auth2.attachClickHandler（...）来获取信息？