src/lib/auth.ts

import { NextAuthOptions } from "next-auth";
import GoogleProvider from "next-auth/providers/google";

export const authOptions: NextAuthOptions = {
    providers: [
        GoogleProvider({
            clientId: process.env.GOOGLE_CLIENT_ID || "",
            clientSecret: process.env.GOOGLE_CLIENT_SECRET || "",
        }),
    ],
    secret: process.env.NEXTAUTH_SECRET,
    pages: {
        signIn: "/",
    },
    callbacks: {
        async session({ session, token }) {
            if (session.user) {
                (session.user as any).id = token.sub;
            }
            return session;
        },
    },
};