deleteBackend.js

router.post('/deleteUser', function(req, res, next) {
  User.remove({_id : req.body.id}, function(err) {
    if (err) {
      console.log("not removed!");
      res.status(400);      
      res.send();
    }

    console.log("removed!");
    res.send({status: 'ok'});
  });
});