Microservices communication with subscriptions?

[marcellolanfranchi]

Hello!
I'm using your library, hot chocolate, and it is amazing! Thanks so much for doing an incredible job on it!
I have a question for you.
First of all, I am quite new in the .net world and I'm coding for fun, with no real experience so maybe my question is silly.
I am trying to implement a microservice architecture for my app using hot chocolate. I'm using a gateway schema and lots of things already work (surprisingly).
Tell me if it is completely wrong, but I would like to use your event pub/sub system to implement inter microservices communication.
I'm using subscriptions on Redis for each microservices and I can subscribe for an event if I call the specific subscription from Banana cake pop. However, I do not understand how I could subscribe to an event without making an HTTP call. I would like to be able to subscribe for events when the microservice is starting so that it is able to receive events triggered by other microservices.

I really hope my question is not too silly, and if so, my apologies. Thanks for any help,
Marcello