I implemented Google OAuth login using next-auth. In the async signIn function, I query the database with the getUser function, and if it is the first time the user logs in, I redirect them to the /sign-up page. However, on the /sign-up page, I found that the session was null. I considered using an adapter, but it would create many tables in the database. I want to minimize the values stored in the database.

// auth.ts
export const { handlers, auth } = NextAuth({
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID as string,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET as string,
    }),
  ],
  callbacks: {
    async signIn({ user, account, profile }) {
      if (account?.provider === "google") {
        const isNewUSer = await getUser({ uuid: profile.sub });

        if (!isNewUSer) {
          return true;
        }
      }
      return "/sign-up";
    },
    async jwt({ token, account, profile }) {
      if (account && profile) {
        token.sub = profile.sub;
        token.name = profile.name;
        token.email = profile.email;
        token.isNewUser = false;
      }

      return token;
    },
    async session({ session, token }) {
      if (session.user) {
        session.user.id = token.sub;
        session.user.isNewUser = token.isNewUser as boolean;
      }
      return session;
    },
  },
  pages: {
    signIn: "/login",
    newUser: "/sign-up",
  },
});

// /sign-up/page.tsx
import { auth } from "@/auth";

export default async function SignUp() {
  const session = await auth();
  console.log("sign-up session = ", session); // looged with google, but session is null
  return (
    <div>
      <form>
        {/* "The action stores user information such as nickname, uuid, and email in the database.  */}
        <input type="text" placeholder="Enter your Nickname" name="nickname" />
        <button>Submit</button>
      </form>
    </div>
  );
}

How can I redirect a new user to the /sign-up page while passing the user information received from Google?

next-router:app-router

next:14.2.16

next-auth:5.0.0 (beta)