Overview
This article describes how to authenticate with GakuNin RDM using Nuxt 3 and @sidebase/nuxt-auth.
Demo App

Repository
https://github.com/nakamura196/nuxt-rdm
Notes
Initially, the following warning was displayed.
AUTH_NO_ORIGIN: No origin - this is an error in production, see https://sidebase.io/nuxt-auth/resources/errors. You can ignore this during development
Therefore, based on the following reference:
https://auth.sidebase.io/resources/error-reference
I configured it as follows, which resulted in an error.
The cause was that I was using an rc version of the library.
By changing the version as follows, the error was resolved.
I hope this helps others experiencing the same issue.
Summary
There may be aspects that could be improved, but I hope this serves as a helpful reference.