We’re working on adding an option to unlink your Sonos account from plex.tv, but in the meantime you can do this as a workaround:
- Find your Plex token https://support.plex.tv/articles/204059436-finding-an-authentication-token-x-plex-token/
- In your browser, and using your own token, go to the following address:
https://sonos.plex.tv/unlink?X-Plex-Token=YOURTOKEN