1. authelia
first, go to authelia, check 'remember me', and log in
your username is your email address
if you get 'incorrect username or password', hit 'reset password?', or confirm you are using the correct email address
2. jellyfin
go to jellyfin.cliny.net. this must be done via a web browser (eg firefox) because jellyfin SSO generally won't work anywhere else (eg android app)
hit 'authelia'
check 'remember consent' and accept the consent request
then log in to other devices (eg android app) by using quick connect
3. jellyseerr
go to jellyseerr.cliny.net, and hit 'authelia'
check 'remember consent' and accept the consent request
pro tips
if you can't log in to jellyfin, delete the current cliny.net server from the app, and start again from step 1
to fix playback issues, wrong audio, subtitle settings, etc, go to your jellyfin settings and change things
to fix issues with movies/shows, you can report an issue in jellyseerr
updates from cliny
all good