GcConfig\Controller\UserController::loginAction PHP Method

    public function loginAction()
    {
        if ($this->getServiceLocator()->get('Auth')->hasIdentity()) {
            $redirect = $this->getRouteMatch()->getParam('redirect');
            if (!empty($redirect)) {
                return $this->redirect()->toUrl(base64_decode($redirect));
            }
            return $this->redirect()->toRoute('admin');
        }
        $this->layout()->setTemplate('layouts/one-page.phtml');
        $loginForm = new UserLogin();
        $post = $this->getRequest()->getPost();
        if ($this->getRequest()->isPost() and $loginForm->setData($post->toArray()) and $loginForm->isValid()) {
            $userModel = new User\Model();
            $redirect = $loginForm->getValue('redirect');
            if ($userModel->authenticate($post->get('login'), $post->get('password'))) {
                if (!empty($redirect)) {
                    return $this->redirect()->toUrl(base64_decode($redirect));
                }
                return $this->redirect()->toRoute('admin');
            }
            $this->flashMessenger()->addErrorMessage('Can not connect');
            return $this->redirect()->toRoute('config/user/login', array('redirect' => $redirect));
        }
        $loginForm->get('redirect')->setValue($this->getRouteMatch()->getParam('redirect'));
        return array('form' => $loginForm);
    }