There is no description of compatibility with discord auth in the document, so I just tested it. After connecting my Steam account and Discord account with discord auth and checking whether the role is paid, the role is paid well. Would you like to add discord auth to works with?

Hey, This plugin works with any plugin that uses linking from the Discord Extension which both DiscordAuth and DiscordCore use.

I had misunderstood the concept of extension. okay. thank you!