How to enable JetStream for account in embedded nats?

[Codebreaker101]

In an embedded nats I want to create a user test and assign it to an account APP. I want the account APP to have jetstream enabled. To enable jetstream for an account i must call EnableJetStream() function on the *server.Account. But to create users attached to an account I need to specify a *server.Account before the server has been created in the *server.Options. I could create an account using server.NewAccount("APP") but then this account will not be connected to the server and calling EnableJetStream will result in an error.

This looks like a chicken and egg problem which I don't know how to solve using the available exported API.

func nats() error {
        appAcc := server.NewAccount("APP")
	// NOTE: I can't enable jetstream because this account isn't yet registered with server
	// if err := appAcc.EnableJetStream(nil); err != nil {
	// 	return fmt.Errorf("failed to enable jet stream for APP account: %w", err)
	// }

	// var appAcc *server.Account

	opts := &server.Options{
		DontListen:             true,
		JetStream:              true,
		DisableJetStreamBanner: true,
		Websocket: server.WebsocketOpts{
			Host:  "0.0.0.0",
			Port:  55555,
			NoTLS: true,
		},
		Accounts: []*server.Account{
			appAcc,
		},
		Users: []*server.User{
			{Username: "admin", Password: "admin", Account: appAcc},
		},
	}

	ns, err := server.NewServer(opts)
	if err != nil {
		return fmt.Errorf("failed to initiate nats server: %w", err)
	}

	ns.ConfigureLogger()

	go ns.Start()

	if !ns.ReadyForConnections(time.Second * 5) {
		return errors.New("nats server timeout while waiting to be ready")
	}

	prepare(ns)

	<-ctx.Done()

	ns.Shutdown()
	ns.WaitForShutdown()

	return nil
}


func prepare(ns *server.Server) {
	nc, err := nats.Connect(nats.DefaultURL, nats.InProcessServer(ns), nats.UserInfo("admin", "admin"))
	if err != nil {
		panic(err)
	}

	js, err := nc.JetStream()
	if err != nil {
		panic(err)
	}

	kv, err := js.CreateKeyValue(&nats.KeyValueConfig{
		Bucket:  "projections",
		Storage: nats.MemoryStorage,
	})

	if err != nil {
		panic(err)
	}

	_ = kv
}

[Codebreaker101]

Resolved in #6261