Azureservicebus integration | expected 2xx response, got: 401 ()" integration="*azureservicebus.Integration"

I have configured Chirpstack application using:www.chirpstack.io/project/guides/microsoft-azure/
and configured to drop the final packet to azure service bus for consumption purpose.

we are also getting packets periodically into service-bus as well, however we are seeing following error in logs.

Mar 21 23:47:42 TntChirpstackNetworkApplicationServer chirpstack-application-server[4589]: time=“2022-03-21T23:47:42.094490935Z” level=error msg=“integration/multi: integration error” ctx_id=3f120f89-197e-4030-9c68-4e81e52e6014 error=“expected 2xx response, got: 401 ()” integration="*azureservicebus.Integration"

sample logs:

*Mar 21 23:28:39 TntChirpstackNetworkApplicationServer chirpstack-application-server[4589]: time=“2022-03-21T23:28:39.726721954Z” level=error msg=“integration/multi: integration error” ctx_id=5dd2cd78-e01b-4467-83ff-9c032b0d55d2 error=“http request error: Post “https://service-bus.servicebus.windows.net/tnt-chirpstack-frame-queue/messages”: context canceled” integration="azureservicebus.Integration"

*Mar 21 23:28:39 TntChirpstackNetworkApplicationServer chirpstack-application-server[4589]: time=“2022-03-21T23:28:39.727805519Z” level=error msg=“integration/multi: integration error” ctx_id=5dd2cd78-e01b-4467-83ff-9c032b0d55d2 error=“http request error: Post “https://service-bus.servicebus.windows.net/tnt-device-event/messages”: context canceled” integration="azureservicebus.Integration"

A 401 status means unauthorized. Are you sure you have configured the correct tokens?