public function login()
    {
        try {

            if (!$this->hasRequestParameter('successCallback')) {
                throw new \common_exception_MissingParameter ('Internal error, please retry in few moment');
            }

            if ($this->isRequestPost()) {
                $authorizationService = $this->getServiceLocator()->get(Authorization::SERVICE_ID);

                if (!$authorizationService instanceof RequireUsername) {
                    throw new InvalidCallException('Authenticator need to be call by requireusername');
                }

                if ($authorizationService->validateLogin($this->getRequestParameter('login'))) {
                    $baseUrl = $this->getServiceLocator()
                        ->get(\common_ext_ExtensionsManager::SERVICE_ID)
                        ->getExtensionById('taoClientDiagnostic')
                        ->getConstant('BASE_URL');
                    $elements = parse_url($baseUrl);
                    $this->setCookie('login', $this->getRequestParameter('login'), null, $elements['path']);
                    $this->redirect($this->getRequestParameter('successCallback'));
                }
            }

        } catch (InvalidLoginException $e) {
            $this->setData('errorMessage', $e->getUserMessage());
        }

        $this->setData('successCallback', $this->getRequestParameter('successCallback'));
        $this->setData('client_config_url', $this->getClientConfigUrl());
        $this->setData('content-controller', 'taoClientDiagnostic/controller/Authenticator/login');
        $this->setData('content-template', 'Authenticator' . DIRECTORY_SEPARATOR . 'login.tpl');
        $this->setView('index.tpl');
    }