How to reset my Raspberry Pi so it is no longer attached to an account



People pay me to setup Plex on a Raspberry PI 3. In order to test it I check it against my account.
How do I make sure that the image I give them is not tied to a Plex account? I thought I had it figured out by deleting the Preferences.xml and the but it still finds the last account and just gives me a "Select User" screen for that account.

Please help. I look forward to your reply. I have a bunch to build but need this resolved first.


Try revoking the server's token from
Settings - Devices - Server

Keep in mind that running the server on a RasPi is not supported.