nanochat/services/frontend/auth.ts

import NextAuth from 'next-auth';
import Google from 'next-auth/providers/google';
import GitHub from 'next-auth/providers/github';

export const { handlers, auth, signIn, signOut } = NextAuth({
  trustHost: true,
  secret: process.env.NEXTAUTH_SECRET,
  providers: [
    Google({
      clientId: process.env.GOOGLE_CLIENT_ID,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    }),
    GitHub({
      clientId: process.env.GITHUB_CLIENT_ID,
      clientSecret: process.env.GITHUB_CLIENT_SECRET,
    }),
  ],
  pages: {
    signIn: '/login',
  },
  session: { strategy: 'jwt' },
  callbacks: {
    async jwt({ token, account, profile }) {
      if (account) {
        token.provider = account.provider;
      }
      return token;
    },
    async session({ session, token }) {
      if (session.user && token.sub) {
        (session.user as { id?: string }).id = token.sub;
      }
      return session;
    },
  },
});