How to send a message to a specific subscriber among the subscribers?

[namiomiru]

Hi everyone. How to send a message to a specific subscriber among the subscribers?

func (r *subscriptionResolver) Message(ctx context.Context) (<-chan string, error) {

	randomString := make(chan string, 1)
	go func() {
		<-ctx.Done()
	}()

	randomString <- randString(8)

	return randomString, nil
}