Error booting of rabbitmq service

When I boot in single/multi user environment:
starting rabbitmq.
chwon: rabbitmq : illegal user name..

I suspected that I forgot to add the default user or not configure properly before rebooting. I tried entering in command console, by disabling the rc.conf but no lock. It says its read-only. How to disable this service (rabbitmq) and continue loading and booting the system.
I figured out how to fix my issue:

In single user mode; I used these commands:
mount -u /
mount -a -t ufs