score:1
the first error is because you are not requiring express:
var express = require('express');
and to use express router, you'd want to declare the router, define the routes using it and then import the route file to use as middleware.
you could make a separate user routes file:
var express = require('express');
var router = express.router();
router.get("/", function(req, res) {
//route actions
});
...
module.exports = router;
and then import it and use it in your server.js file like so:
var userroutes = require('./userroutespath')
app.use("/users", userroutes);
hope this helps.
Source: stackoverflow.com
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