Use API key instead of signing in (OAuth)

[EmeraldSnorlax]

Perhaps allow use of an API key (OAuth sign-in), rather then signing in directly to jellyfin?
This would also allow other users to sign in to last.fm without them giving me their password, etc

[EssKayz]

Do you accept PR's to implement this feature?
I've done some mild headbanging to get something similar to this working - albeit with the following caveats:

• I don't think it's possible to implement a UI for users to do the entire process themselves due to Jellyfin plugin limitations for creating new Client elements
  • As a workaround, I've made it so that I can provide a LastFM authentication link, where they can give access themselves, and once they've verified they've approved the request, I can then save their session token.
  • I retained the Username Column, albeit it is not required and is populated through the response from LastFM instead of manually typed in.