async () => {
    try {
      const newDbClient = await MongoClient.connect(this.url,
        this.options);
      console.log(`DB is connected? ${newDbClient.isConnected()}`);
      ConnectMeCore.dbClient = newDbClient;
      return newDbClient;
    } catch (error) {
      console.error(`MongoDB connection failed with > ${error}`);
    }
  };