public static function invalidatePassword($user = null)
	{
		$hzup = self::getInstance($user);

		$hzup->__set('shadowFlag', '-1');
		$hzup->update();

		return true;
	}
public static function invalidatePassword($user = null)
	{
		$hzup = self::getInstance($user);

		$hzup->__set('shadowFlag', '-1');
		$hzup->update();

		return true;
	}
public static function invalidatePassword ( $ user = null ) { $ hzup = self :: getInstance ( $ user ) ; $ hzup -> __set ( 'shadowFlag' , '-1' ) ; $ hzup -> update ( ) ; return true ; }
Invalidate a user's password

@param   mixed   $user
@return  bool
Invalidate a user s password