Cloud function init

func init() {
	// For testing
	cloudFunctionID = strconv.FormatInt(time.Now().UTC().UnixNano(), 10)
	log.Println("A new cloud function is being inilialized: ", cloudFunctionID)

	// err is pre-declared to avoid shadowing client.
	var err error

	// client is initialized with context.Background() because it should
	// persist between function invocations.
	client, err = pubsub.NewClient(ctx, os.Getenv("PROJECTID"))
	if err != nil {
		log.Fatalf("pubsub.NewClient: %v", err)
	}

	topic = client.Topic(os.Getenv("TOPICID"))

	// Initialize Redis
	var redisError error
	redisPool, redisError = initializeRedis()
	if redisError != nil {
			log.Printf("initializeRedis: %v", err)
			return
	}
}