title: How to redirect to post request in express
body: <p>I'm creating a landing page that when hit, automatically triggers a Facebook authentication flow. However, I'm unable to automatically redirect from the index to the <code>signup</code> route. How do I redirect from a <code>GET</code> request to a <code>POST</code> request in express? </p>
  
  <pre><code>    router.get('/', function(req, res) {
          //redirect to login function
      });
  
      router.post('/signup', passport.authenticate('signup', {
        //Log user in on facebook
      }));
  </code></pre>