Instagram API in Express

I can't make an API call to instagram with Express and below is my code that I followed online, but still failed =[ Am I missing something?

var express = require('express');
var instagram = require('instagram-node').instagram();
var access_token = 'my token'; // not displaying it in public

app.get('/api/profile', function(req,res){
  instagram.use({
    access_token: access_token
  });
  instagram.media_popular(function(err,medias,remaining,limit){
    if(err){throw err}
    console.log('medias',medias);
    res.send('You made it!!');
  });
});

via learner