Full auth config:

export const options = {
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID as string,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET as string,
    }),
  ],
  secret: process.env.NEXTAUTH_SECRET as string,
};

And then the auth route:

import NextAuth from "next-auth";

import { options } from "@/src/lib/nextauth";

const handler = NextAuth(options);

export { handler as GET, handler as POST };

And finally, using the default middleware:

export { default } from "next-auth/middleware";

Logs show no errors... It redirects when I click on "Log in with Google" and redirects back to the login page - with __Secure-next-auth.session-token cookie...

It's an internal app (Google) and hosted on Netlify.