token refresher

token-refresher.js

//https://www.thathandsomebeardedguy.com/i'd-love-to-❤️-you-more
var credentials = {
		clientId: 'someclientid',
		clientSecret: 'someclientsecret',
		redirectUri: 'http://localhost:8888/callback'
};
//npm install spotify-web-api-node --save
var SpotifyWebApi = require('spotify-web-api-node');
var spotifyApi = new SpotifyWebApi(credentials);
//npm install fs
var fs = require("fs");
var file = "token.txt";
var data = fs.readFileSync(file);
var token = data.toString().replace('\n','');
console.log(token);
spotifyApi.setAccessToken(token);
spotifyApi.setRefreshToken('A valid refresh token');

spotifyApi.refreshAccessToken().then(
		function(data) {
				fs.writeFile(file, data.body['access_token'], function(err){
					if (err) {
						//handle error
					}
				});
		},
		function(err) {
				//handle error
		}
);