Hi guys and girls. Thanks for all the amazing work 
I am currently working on a custom solution where we would like to use only the gateway bridge and not the rest of chirpstack.
So the bridge is setup to use MQTT, and I subscribe to those topics and receive the JoinRequests as they come in.
But to what topic should I publish the JoinAccepts on for the Gateway Bridge to correctly pick them up and send them back to the devices?
I hope the question makes sense, otherwise I would be happy to elaborate.