title: How do I securely tell my web app this user Auhenticated through google Oauth?
body: <p>I have a C# MVC5 Web Application w/ the built in Account login stuff from MS.</p>
  <p>I followed this tutorial: <a href="https://developers.google.com/identity/sign-in/web/sign-in" rel="nofollow noreferrer">https://developers.google.com/identity/sign-in/web/sign-in</a></p>
  <p>I am getting back my login details in the console as the tutorial states (this works):</p>
  <pre><code> function onSignIn(googleUser) {
              var profile = googleUser.getBasicProfile();
              console.log('ID: ' + profile.getId()); // Do not send to your backend! Use an ID token instead.
              console.log('Name: ' + profile.getName());
              console.log('Image URL: ' + profile.getImageUrl());
              console.log('Email: ' + profile.getEmail()); // This is null if the 'email' scope is not present.
          }
  </code></pre>
  <p>But how do I now tell my application that this user is good to go?
  Thanks!</p>