async onAuth(options) {
        //FIXME check fb auth key
        const data = await gameDao.fetchPlayer(options.uid);
        if (data.rows.length > 0) {
            return data.rows[0];
        }
        return false;
    }

    onJoin(client, options, auth) {
        var player = new Player(client.id, auth.name);
        client.player = player;
    }

how to check in another room player data?

    // Code from play room
    async onAuth(options) {
        // this need check player data
        return false;
    }

for example, that players can not enter the location for high levels or the availability of game modes for premium players

You'd need to get the player's information during onAuth in every room he connects to. If you created a AuthRoom with the authentication method, you may want create the PlayRoom extending AuthRoom to have the exact same method.

Something like this (I've wrote this quickly and haven't tested)

export class PlayRoom extends AuthRoom {
  levelRequired = 5;

  async onAuth (options) {
    const data = await super.onAuth();
    if (data.level >= this.levelRequired) {
      return data;
    } else {
      return false;
    }
  }
}

Not sure if that's your question. Let me know if that helps.

Cheers!