Zend Framework comm-app cannot find class - php

Question

I'm following this book, and I'm in chapter 3 and this code is returning me the following error: Fatal error: Class 'Users\Model\User' not found in /var/www/CommunicationApp/module/Users/src/Users/Controller/RegisterController.php on line 70
I want to know what is wrong with the code, or if it's not the code than what is it?
<?php
namespace Users\Controller;
use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;
use Users\Form\RegisterForm;
use Users\Form\RegisterFilter;
use Users\Model\User;
use Users\Model\UserTable;
class RegisterController extends AbstractActionController
{
public function indexAction()
{
$form = new RegisterForm();
$viewModel = new ViewModel(array('form' => $form));
return $viewModel;
}
public function processAction()
{
if (!$this->request->isPost()) {
return $this->redirect()->toRoute(NULL , array(
'controller' => 'register',
'action' => 'index'
));
}
$post = $this->request->getPost();
$form = new RegisterForm();
$inputFilter = new RegisterFilter();
$form->setInputFilter($inputFilter);
$form->setData($post);
if (!$form->isValid()) {
$model = new ViewModel(array(
'error' => true,
'form' => $form,
));
$model->setTemplate('users/register/index');
return $model;
}
// Create user
$this->createUser($form->getData());
return $this->redirect()->toRoute(NULL , array(
'controller' => 'register',
'action' => 'confirm'
));
}
public function confirmAction()
{
$viewModel = new ViewModel();
return $viewModel;
}
protected function createUser(array $data)
{
$sm = $this->getServiceLocator();
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new \Zend\Db\ResultSet\ResultSet();
$resultSetPrototype->setArrayObjectPrototype (new \Users\Model\User); //line 70
$tableGateway = new \Zend\Db\TableGateway\TableGateway('user' /* table name */, $dbAdapter, null, $resultSetPrototype);
$user = new User();
$user->exchangeArray($data);
$userTable = new UserTable($tableGateway);
$userTable->saveUser($user);
return true;
}
}

Answer 1

for a correct autoloading check if the model file is in the following directory
/module/Users/src/Users/Model/User.php
if is not zend can't autoload your model file and that triggers your error if (as you pointed out your classname and namespace in the model file is correct) the file is not placed there.