Open the console and type:
cake schema create --plugin Users
Load the plugin in the file Config/bootstrap.php
CakePlugin::loadAll(array(
array('routes' => true, 'bootstrap' => true, 'ignoreMissing' => true)
));
Modify the AppController.php file.
public function beforeFilter(){
parent::beforeFilter();
if (isset($this->params['prefix']) && $this->params['prefix'] == 'admin') {
$this->Auth->deny();
}else{
$this->Auth->allow();
}
}