Dynamically load routes with express.js

I am using express.js as a webserver and would like an easy way to separate all the "app.get" and "app.post" functions to separate files. For example, if I would like to specify get and post functions for a login page, I would like to have a login.js file in a routes folder that is dynamically loaded (will automatically add all of the files without having to specify each one) when I run node app.js

I have tried this this solution!, but it isn't working for me.

app.js

var express=require("express");
var app=express();
var fs=require("fs");
var routePath="./routers/"; //add one folder then put your route files there my router folder name is routers
fs.readdirSync(routePath).forEach(function(file) {
    var route=routePath+file;
    require(route)(app);
});
app.listen(9123);

I have put below two routers in that folder

route1.js

module.exports=function(app){
  app.get('/',function(req,res){
     res.send('/ called successfully...');
  });
}

route2.js

module.exports=function(app){
app.get('/upload',function(req,res){
  res.send('/upload called successfully...');
});
}