Comment to Rocketchat
This is interesting.
I tried setting up Rocket Chat and messed something up in the settings and now it's basically locked me out 100%, I have zero ability to change anything and (using Una Hosted) I tried to uninstall and reinstall, and it made no change.
Tim Burleigh have you tried the RocketChat mobile app? Your setup seemed to work really well when I was playing on it.
I do think Alex T⚜️ maybe able to help you get in the backend. Did you remove the email login from the index page of your chat James Cherry ?