I have my next js application hosted in a sub path `https://mydomain.com/app`, after login it always taking me to `https://mydomain.com`

Help
,
1 
import { handleAuth, handleCallback, handleLogin } from '@auth0/nextjs-auth0'

import { NextApiRequest, NextApiResponse } from 'next'

export default handleAuth({
  login: async (req: NextApiRequest, res: NextApiResponse<any>) => {


    const authParams = {
      audience: process.env.AUTH0_AUDIENCE,
    }

    try {
      await handleLogin(req, res, {
        authorizationParams: {
          ...authParams,
        },
        returnTo: '/app'
      })
      
    } catch (error: any) {
      res.json(error)
      res.status(500).end()
    }
  },
  
})

Here is my auth code, I am not sure what I am doing wrong