Not sure where to start. I had installed MQTT broker and ZigBee2MQTT add-on. Everything seemed to be ‘ok’ except I could not add in devices. The button for adding devices was there - but using it had no effect. I got the brilliant idea of restarting Home Assistant - and then on startup I got an error stating that authentication for MQTT broker had expired. I was asked for a user name and password which were correctly pre-filled in - but no matter what I tried I got an “invalid authentication error”. So I got another great idea and deleted both the broker and Z2M add-on - asking that all data be deleted - but when I reinstall the broker - I am still asked for the password and the correct information is still pre-filled in - but I still get a invalid authentication error. Not sure what to do next. Any assistance would be greatly appreciated!