Multiple auth0 in single source

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Hi auth0 team, thank you for provide such as wonderful product.

While continue providing good experienced to users I got an issue need your aid as I describe below.

My application are host for multiple websites, each website will have its own auth0 configuration.

Currently I use nextjs version 14.2.35, nextjs-auth0 version 3.5.0, which I can create api such as: /login, /callback, /logout, /me, …

Example for /login:

import { getReturnToUrl } from '@/packages/constant/application_meta_data';
import Auth0Instance from '@/packages/constant/auth0_factory';
import { headers } from 'next/headers';
import { NextResponse } from 'next/server';

export async function GET(req: any, res: any) {
  const host = headers().get('host') ?? '';
  const authInstance = Auth0Instance(host);
  const returnTo = getReturnToUrl(host);
  try {
    const response = await authInstance.handleLogin(req, res, {
      authorizationParams: {
        scope: 'openid offline_access email profile',
        prompt: 'login',
      },
      returnTo: returnTo,
    });
    return response;
  } catch (error: any) {
    return NextResponse.json(
      { message: error.message },
      { status: error.status || 400 },
    );
  }
}

authInstance is Auth0Server import from @auth0/nextjs-auth0 .

I want to upgrade mine nextjs-auth0 version to newest which is v4.16.2 but when I do, the function handleLogin, handleLogout, handleProfile, … are not exposed to public and all the route need to be injected via proxy or middleware.

So If I do the upgrade I will lost ability to host multiple websites with different configuration, but If I don’t I won’t able to use newest features like Custom Token Exchange.

Please take a look when you’re available.

Best regard,

Trung Tran