I am very new to using Chirpstack application server and network server use and I was wondering is there anyway to get the MQTT broker to message to the application server and have the application server respond to that message without creating an application ID and device EUI? And also if that information can be stored anywhere. As of now I have done a basic subscribe and publish from my EC2 instance on AWS to a virtual instance on my machine, but I want to be able to perform the same action with the application server. Please let me know if I am not being clear and I will try and re-word what am trying to accomplish. Please let me know think. Thank you.