No login with Mosquitto Go Auth plugin

ChirpStack Application Server
1

Hello
I tried to set up the MQTT integration and I would like to use the Mosquitto Go Auth plugin for authorization. The plugin is build following the instructions at MQTT authentication & authorization - ChirpStack open-source LoRaWAN<sup>®</sup> Network Server. Only difference is I commented the jwt part, as it is not needed at the moment.
When I connect a new client, it gets disconnected immediately. Mosquitto log shows a hash problem

invalid PBKDF2 hash supplied, expected length 5, got: 4 
WARN[2021-03-03T09:35:24+01:00] wrong password for user  XXX

every second try and at startup

WARN[2021-03-03T09:35:24+01:00] unknown or empty hasher, defaulting to PBKDF2
INFO[2021-03-03T09:35:24+01:00] Backend registered: Files
WARN[2021-03-03T09:35:24+01:00] unknown or empty hasher, defaulting to PBKDF2
INFO[2021-03-03T09:35:24+01:00] backend registered: Postgres

Does anyone has an idea what I’m messed up or how to solve this?

2

Sry, found a incorrect duplicate of my user causing the hash entries at runtime. :roll_eyes:

But the original problem still exists; mosquitto_sub gets disconnected immediately.