Cannot login on LAN, wrong password?

[TheDreadPirate]

I'm assuming you did the part of the tutorial where you mounted /config to a host volume?

If so, stop your container and then go to that folder and find /config/system.xml. Open the file to edit and near the top will be "IsStartupWizardComplete". Change that from true to false. Save, close, start the container. Open your browser and navigate to your Jellyfin server. It will go through the initial setup again, including recreate the admin account. When you get to the steps for the library it will already be populated with your existing libraries. Just click next until you get to the end.