code: public function checkLoggedInAction() 
      {
      	$data = array('logged' => 0, 'data' => null);
      	
      	if(!$this->zfcUserAuthentication()->hasIdentity()) {
      		return new JsonModel($data);
      	}
      	
      	$identity = $this->zfcUserAuthentication()->getIdentity();
      	$data['logged'] = 1;
      	$userModel = $this->getServiceLocator()->get('user.model.user');
      	$data['data'] = $userModel->init($identity, $this->getServiceLocator());
      	
  		return  new JsonModel($data);
      }
docs: WS to check if user is logged in