how i can use following. 
i have columns in my table wf\_users: `wf_username, wf_password` now in my form i don´t wanna anyone to se my table structure therefore i use in my Form

`$this->Form->input("username")­;`  
and not the   
`$this->Form->input("wf_username")­;`  

 my post looks like this 

`User=>array( 'username', 'password' );` 

now i need them to change into my named column or that want do the trick to login in the allowed area because it try´s to fetch with wrong column (with `"username"` not with `"wf_usernam"`).

My AppController:

```
class AppController extends Controller {

    public $viewClass = 'Theme';

    public $theme;

    public $components = array(
                            'Auth'=> array(
                                'loginRedirect'=>array('controller'=>'users', 'action'=>'dashboard'),
                                'logoutRedirect'=>array('controller'=>'users', 'action'=>'dashboard'),
                                'authError'=>'yout can´t access the page!',
                                'authorise'=>array('Controller'),
                                #'authenticate' => array(
                                #   'Form' => array(
                                #       'fields' => array(
                                #           'wf_auth_user_username' => 'username',
                                #           'wf_auth_user_password' => 'password'
                                #       )
                                #   )
                                #)
                            ),
                            'Session'
                         );

    //Before mainlayout
    public function beforeFilter() {
        parent::beforeFilter();
        $this->theme = 'SM';
        $this->Auth->fields = array('username'=>'wf_auth_user_username','password'=>'wf_auth_user_password');
        //Configure AuthComponent
        $this->Auth->allow('*');
        //Logged in user
        $this->set('isauth', 'loggedout'); //$this->userpanelAuth());
    }

    public function isAuthorized($user) {
        return true;
    }

    protected function userpanelAuth() {
        if($this->isAuthorized()) {
            return 'loggedin';  
        }else{
            return 'loggedout';
        }
    }

}

```

And This is my Form:

```
                            <div id="display-panel">
                                <?
echo $this->Session->flash();

                                        echo $this->Form->create('User', array('action' => 'login'));
                                        echo $this->Form->input(
                                            'username', 
                                                array('label'=>false, 'div'=>false,'placeholder'=>'Benutzername',''));
                                        echo $this->Form->input(
                                            'password', 
                                                array('label'=>false, 'div'=>false,'placeholder'=>'Passwort'));

                                        echo $this->Form->end(array('label'=>'login','div'=>false));
                                ?>
                            </div>

```