I follow Acl example in manual of cake .  
 When success I have more question for apply 
Acl to My project   

```
 function initDB() {
    $group = & $this->User->Group;
    //Allow admins to everything
    $group->id = 1;
    $this->Acl->allow($group, 'controllers');

    //allow managers to posts and widgets
    $group->id = 2;
    $this->Acl->deny($group, 'controllers');
    $this->Acl->allow($group, 'controllers/Posts');
    $this->Acl->allow($group, 'controllers/Widgets');

    //allow users to only add and edit on posts and widgets
    $group->id = 3;
    $this->Acl->deny($group, 'controllers');
    $this->Acl->allow($group, 'controllers/Posts/add');
    $this->Acl->allow($group, 'controllers/Posts/edit');
    $this->Acl->allow($group, 'controllers/Widgets/add');
    $this->Acl->allow($group, 'controllers/Widgets/edit');
    //we add an exit to avoid an ugly "missing views" error message
    echo "all done";
    exit;
} 

```

In code   
1.How to limit user to access only the information of his own   

2.I need to alert when deny user access to action  

3.when login as any role I can't acess to logout action  

thank you