How to catch errors like access_refused when using client.publish

[myasul]

We are setting up permissions for all of our MQTT users and want to test out if the user can't really access certain queues without the correct permission. But when I used client.publish(topic, payload, {qos: 1}) it just tries to keep sending it.

When I changed it to {qos: 0}, it fired and forgot. I also tried wrapping it in a try-catch statement, but I'm not catching anything.

Please advise.

[rdgout]

We are also encountering this issue, it would be great if an error could be thrown when there are no permissions.
Our application just hangs when this happens.