Missing Method in UsermembershipsController

Error: The action add is not defined in controller UsermembershipsController

Error: Create UsermembershipsController::add() in file: app/controllers/usermemberships_controller.php.

<?php
class UsermembershipsController extends AppController {

	var $name = 'Usermemberships';


	function add() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp.