Forgot Username, reinstall prompts login again

[Tom Dude]

I tried to access my server and it asked for a username and password, which I don't remember making. I tried finding the logs folder because I read you can see your username there, but I couldn't find it (it wasn't in the install directory). I then uninstalled Jellyfin through windows and reinstalled it. However, it asked me for my username and password again. Is there a way I can just reset my login details? I'm on Windows 11 and it is not installed as a service.

EDIT: I found the logs. They contain no username, so I am once again stuck.

[TheDreadPirate]

Stop Jellyfin then edit this file

C:\ProgramData\Jellyfin\Server\config\system.xml

There will be a line near the top that is called IsStartupWizardComplete. Switch that from true to false. Start Jellyfin. It will walk you through the initial setup and allow you to re-create the admin account name and password. Skip the rest of the steps.