example of ZfcUser ControllerPlugin

gistfile1.php

<?php

//module.php

  public function getControllerPluginConfig()
    {
        return array(
            'invokables' => array(
               'zfcUserAuthentication' => 'ZfcUser\Controller\Plugin\ZfcUserAuthentication'
            )
        );
    }

//controller
    public function indexAction()
    {
        if ($this->zfcUserAuthentication()->hasIdentity()){
              //do something
        }
    }