If you want to read the datas from end device pushing from lora app server means you have many choices.
MQTT is one option.
topic write gateway/+/event/+
topic read gateway/+/command/+
topic read gateway/+/event/+
topic write gateway/+/command/+
topic write application/+/device/+/rx
topic write application/+/device/+/join
topic write application/+/device/+/ack
topic write application/+/device/+/error
topic read application/+/device/+/tx
topic write application/+/device/+/status
topic write application/+/device/+/location
topic read application/123/device/+/+
topic write application/123/device/+/tx
these are the topics can be used.
this link might be helpful https://www.chirpstack.io/guides/mqtt-authentication/#mosquitto-configuration