Correct way to access the "request" object during "token endpoint".

I want to access the request object of the token endpoint so that I'll know the request headers accessing it.

As shown in this section:

app.post('/token',
  passport.authenticate(['basic', 'oauth2-client-password'], { session: false }),
  server.token(),
  server.errorHandler());

I understand that the server.token() part returns the access tokens in the response of the POST /token endpoint.

So I tweaked that part to in order for me to access the request object which got me here:

app.post("/token", 
     passport.authenticate(['basic', 'oauth2-client-password'], { session: false }), (request, response) => {
   // Now where to implement this?
  // server.token();
  console.log(request.headers);
  response.status(200).json({access_token: 'asfdasfd', expires_at: 'asdfasdf', token_type: 'asdfasdf'});
});

I can access the request headers but now I cannot get the right tokens. Is there anyway to implement this correctly?

thanks

Start with the token endpoint entry point shown in the issue: the app.post('/token') middleware chain using passport.authenticate, server.token(), and server.errorHandler(). Trace how server.token() produces the access-token response while preserving access to the request headers. Done means the endpoint exposes the needed request information and still returns the correct tokens.