help2.js

validateRegister(req.body)
.then(function(errors){
  if(errors.count > 0){
  	res.send({state: 'failure', registerFormErrors: errors.messages, errorCount: errors.count});
  	return;
  }
  //this won't always happen
  return db.createUser(req.body.name, req.body.email, req.body.password);
})
.then(function(newUser){
  //what if createUser wasn't added to the chain?
  res.send({state: 'success', name: newUser.name});
})
.catch(function(err){
  res.send(500);
});