private function createForRole($role, $id)
 {
     switch ($role) {
         case User::USER_ADMINISTRATOR:
             // create admin
             $administrator = new Administrator();
             $administrator->user_id = $id;
             $administrator->role = Administrator::ADMINISTRATOR_REGULAR;
             break;
         case User::USER_PLAYER:
             //create player
             $player = new Player();
             $player->user_id = $id;
             $player->bid_coins = Player::PLAYER_BIDCOIN_INITIAL;
             $player->save();
             break;
     }
 }