feat: add sample multi-user support

feat: update README

api/server/routes/authYourLogin.js

@@ -0,0 +1,40 @@
+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
+  req.session.user = {
+    username: 'sample_user',
+    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;