Serverless http api is not receiving user information in redirect callback

Questions
1

I created an Okta application(oidc–> Web Application) that is redirecting
Sign-in redirect URIs https://.amazonaws.com/dev/authorization-code/callback

Created a serverless HTTP API to listen to the callback something like below:
serverless.yml

functions:
  auth:
      handler: src/handler.auth
      events:
        - http:
            path: authorization-code/callback/
            method: get

handler.js

module.exports.auth = async (event, context, callback) => {
  const userinfo = event.userContext && event.userContext.userinfo; // not getting this userinfo here
  const response = {
    statusCode: 301,
    headers: {
      Location: "rediretion url",
    },
    body: userinfo
  };
  callback(null, response);
};

I am expecting this /authorization-code/callback should return user information to me.

My findings I checked in node js express API provided into a doc is working fine for me.

app.get('/', (req, res) => {
  if (req.userContext.userinfo) {
    res.send(`Hi ${req.userContext.userinfo.name}!`);
  } else {
    res.send('Please Sign In');
  }
});

But my business need is to handle in serverless only.

Any help will unblock me to proceed with the task.