What is the best way to retrieve the session token in a route handler when utilizing NextAuth in the file api/generate/route.ts?

I am trying to obtain the session token within a route handler using NextAuth after successfully logging in with GoogleProvider. How can I access the session or token within my backend?

api/generate/route.ts:

import { getServerSession } from "next-auth";


export async function POST(request:Request)
{
 //NOT WORK
 const session = await getServerSession({request})

   ...
}

api/auth/[...nextauth]/route.ts

const handler = NextAuth({
providers:[
    GoogleProvider({
        clientId: process.env.GOOGLE_CLIENT_ID!!,
        clientSecret: process.env.GOOGLE_CLIENT_SECRET!!
      })
],callbacks: {
    async jwt({ token, account, user }) {
      if (account) {
        token.accessToken = await SignToken(user.email as string)
        token.id = user.id
      }
      return token
    }, 
    async session({ session, token, user }) {
        session.user = token
        return session
      },
     
   }
})

export {handler as GET,handler as POST}

Answer №1

Successfully completed the task by configuring NEXTAUTH_SECRET in the .env file.

Answer №2

To begin with, ensure that your jwt callback is correctly configured. Below is an example setup:

package.json

{
  "next": "13.3.1",
  "next-auth": "^4.22.1",
}
  1. [...nextauth].ts:
import NextAuth, {NextAuthOptions} from 'next-auth';
import GoogleProvider from 'next-auth/providers/google';

export const authOptions: NextAuthOptions = {
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_OAUTH2_CLIENT_ID as string,
      clientSecret: process.env.GOOGLE_OAUTH2_CLIENT_SECRET as string,
      issuer: process.env.GOOGLE_OAUTH2_ISSUER as string,
      authorization: {params: {scope: process.env.GOOGLE_OAUTH2_SCOPE}},
      idToken: true, // Ensure this is enabled
    }),
  ],
  secret: process.env.NEXTAUTH_SECRET as string,
  callbacks: {
    async jwt({token, user, account}) {
      // Executes during initial login
      if (user) {
        token.id = user.id;
      }
      if (account) {
        token.accessToken = account.access_token;
      }
      return token;
    },
    // Session callback unnecessary if token isn't needed in the browser/client
  },
};

export default NextAuth(authOptions);
  1. .env
NEXTAUTH_URL='http://localhost:3000'
NEXTAUTH_SECRET='some=string##'
...
  1. /pages/api/get-token-example.ts
// Demonstrates retrieving a JSON Web Token from an API route
import {NextApiRequest, NextApiResponse} from 'next';
import {getToken} from 'next-auth/jwt';

type ResponseData = any;

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse<ResponseData>
) {
  // If NEXTAUTH_SECRET is not set, pass your secret as `secret` to `getToken`
  const token = await getToken({req});

  if (token) {
    // User signed in
    console.log(token.accessToken);
  } else {
    // User not signed in
    res.status(401);
  }
  res.end();
}

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