LibreChat/api/server/routes/authYourLogin.js

const express = require('express');
const router = express.Router();

// WARNING!
// THIS IS NOT A READY TO USE USER SYSTEM
// PLEASE IMPLEMENT YOUR OWN USER SYSTEM

const userSystemEnabled = process.env.ENABLE_USER_SYSTEM || false;

// Logout
router.get('/logout', (req, res) => {
  // Do anything you want
  console.warn('logout not implemented!');

  // finish
  res.redirect('/');
});

// Login
router.get('/', async (req, res) => {
  // Do anything you want
  console.warn('login not implemented! Automatic passed as sample user');

  // save the user info into session
  // username will be used in db
  // display will be used in UI
  if (userSystemEnabled) {
    req.session.user = {
      username: null, // was 'sample_user', but would break previous relationship with previous conversations before v0.1.0
      display: 'Sample User'
    };
  }

  req.session.save(function (error) {
    if (error) {
      console.log(error);
      res.send(`<h1>Login Failed. An error occurred. Please see the server logs for details.</h1>`);
    } else {
      res.redirect('/');
    }
  });
});

module.exports = router;