title: NodeJS Express REST API get request returns empty
body: <p>I am trying to build REST API with NodeJS and Express. I create routes for <code>offers</code> and when I try to send GET request I get empty response with 200 status code</p>
  
  <p>routes.js</p>
  
  <pre><code>  router.get('', passport.authenticate('jwt', { session: true}), OfferController.getOffers);
  </code></pre>
  
  <p>offerController.js</p>
  
  <pre><code>  exports.getOffers = function(req, res) {
      Offer.find({}, function(err, task) {
        if (err){
          return res.send(err);
        }
        res.json(Offer);
      });
    }
  </code></pre>
  
  <p>what is missing here?</p>