public $validate=array(
   'email' => array(
   'rule'=>'email',
   'message'=>'The email field is not currect',
  ),
  'password' =>array(
   'rule'=>array('minLength','8'),
   'required' => true,
   'message'=>'minume 8 charecter long',
   'required'=>true,
  ),
  'user_name'=>array(
   'rule'=>'notEmpty',
   'required'=>true,
   'message'=>'user Name is require',
  ),

 );