module.config.php

'service_manager' => array(
    'factories' => array(
        'Session' => function($sm) {
            return new Zend\Session\Container('ZF2napratica');
        },
        'Admin\Service\Auth' => function($sm) {
            $dbAdapter = $sm->get('DbAdapter');
            return new Admin\Service\Auth($dbAdapter);
        },
        'Cache' => function($sm) {
            $config = include __DIR__ . '/../../../config/application.config.php';
            $cache = \Zend\Cache\StorageFactory::factory(
                array(
                    'adapter' => $config['cache']['adapter'],
                    'plugins' => array(
                        'exception_handler' => array('throw_exceptions' => false),
                        'Serializer'
                    ),
                )
            );

            return $cache;
        }
    )    
),