2025.02.22 next auth: change logic to assign githubId

Author: maslianok

auth.config.ts

@@ -4,5 +4,4 @@ import type { NextAuthConfig } from 'next-auth';
 // https://authjs.dev/guides/edge-compatibility#middleware
 export default {
   providers: [GitHub],
-  debug: true,
 } satisfies NextAuthConfig;

auth.ts

@@ -2,29 +2,28 @@ import { MongoDBAdapter } from '@auth/mongodb-adapter';
 import NextAuth from 'next-auth';
 import authConfig from './auth.config';
 import mongoClientPromise from './lib/mongo-client';
+import { ObjectId } from 'mongodb';
 
 export const { handlers, signIn, signOut, auth } = NextAuth({
   adapter: MongoDBAdapter(mongoClientPromise),
   session: { strategy: 'jwt' },
   ...authConfig,
-  callbacks: {
-    /**
-     * signIn is called whenever a user signs in (OAuth or credentials).
-     * Here we have access to the `profile`, which includes GitHub user info.
-     */
-    async signIn({ account, profile, user }) {
-      // Only do this if the provider is GitHub
-      if (account?.provider === 'github') {
+  events: {
+    signIn: async ({ account, user, profile, isNewUser }) => {
+      if (isNewUser && account?.provider === 'github') {
         const client = await mongoClientPromise;
         const db = client.db('auth');
 
         await db
           .collection('accounts')
-          .updateOne({ userId: user.id }, { $set: { githubId: profile?.node_id, githubLogin: profile?.login } });
+          .updateOne(
+            { userId: new ObjectId(user.id) },
+            { $set: { githubId: profile?.node_id, githubLogin: profile?.login } },
+          );
       }
-      return true;
     },
-
+  },
+  callbacks: {
     async jwt({ token, profile, account }) {
       if (profile && account?.provider === 'github') {
         token.githubId = profile.node_id;