have you looked into creating a custom next-auth adapter?

the provider is the means of how user is authenticated. in this case ure using blizzard
but id assume that ud like to access some sort of a backend after authentication.
hence you might want to look into creating a custom adapter

Hmm. Well I was thinking about that because I'm migrating to the new app directory, and at the same time I want to reworks features that was made too fast, like the auth.
But finally, i'll probably keep the way it is for my backend, and I'll create my authGuard in the middleware. Should do the job, and avoid me to learn all this stuff on NextAuth