更新不同路由节点 js express 中的 Res Local 值

问：

我是 node.js 和 express 的新手，我很难更新我的响应本地值，我想稍后在其他路由上更新myVariable

const express = require('express');
const app = express();
const port = 3000;

app.use((req, res, next) => {
  res.locals.myVariable = 'Initial Value';
  next();
});

const updateRoute = require('./routes/updateRoute');
const accessRoute = require('./routes/accessRoute');

app.use('/update', updateRoute);
app.use('/access', accessRoute);

app.listen(port, () => {
  console.log(`Server is running on port ${port}`);
});

/updateRoute.js

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

router.get('/', (req, res) => {
  res.locals.myVariable = 'Updated Value';
  res.send('Value updated.');
});

module.exports = router;

/accessRoute.js

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

router.get('/', (req, res) => {
  const message = res.locals.myVariable;
  res.send(`Value: ${message}`);
});

module.exports = router;

我想在调用GET请求时更新值，因此一旦调用GET请求，例如，请看到更新值而不是初始值。有什么快速的解决方案吗？myVariable/update /access