Problems with MQTT Connection Refused: not authorised

Good morning, i am having problems with MQTT, i have a user setup (MQTT)
i made the mistake of changing the password on that user, and now i am getting a not autherized error in the log, but i dont know what is trying to use MQTT as i have nothing atm using it, (i did have rtl 433 using it) but in an effort to debug i have both the addon’s uninstalled, and i still get the error any ideas how i can find.
HassIO is running as a VM on a proxmox cluster but i dont think that is adding to this problem, there is no MQTT listing in any yaml file i have hacs installed but currently only addon there is Tesla (no MQTT)