public function deleteAction()
{
//delete a todo item
//retrieve the todo item first
$todo = TodoItem::getItem($this->_params['todo_id'], $this->_params['username'], $this->_params['userpass']);
//delete the TODO item while passing the username and password to authenticate
$todo->delete($this->_params['username'], $this->_params['userpass']);
//return the deleted todo item
//in array format, for display purposes
return $todo->toArray();
}