public static function create($username, $password)
 {
     global $db;
     if (iwatchadmin::username_exists($username)) {
         return array("status" => "username_exists");
     }
     $db->query("insert into iwatchadmin (username,password) values('" . $db->real_escape_string($username) . "', ENCRYPT('" . $db->real_escape_string($password) . "'))");
     return new iwatchadmin($db->insert_id);
 }