spotify-web-api-node - WebapiError: Unauthorized

Question

var SpotifyWebApi = require('spotify-web-api-node');

var spotifyApi = new SpotifyWebApi({
    clientId : 'xxx',
    clientSecret : 'xxx',
    redirectUri : 'https://example.com/callback'
});

spotifyApi.getTrack('2q8eudK0r9ImgCB1XhFfxG').then(function(data) {
    console.log(data);
});

My code worked but for 1 month I have this error.

(node:12824) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): WebapiError: Unauthorized

(node:12824) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

According to this issue you need to set an access token.

spotifyApi.setAccessToken('myAccessToken');

Also, take a look here: https://github.com/thelinmichael/spotify-web-api-node#setting-credentials

// Set necessary parts of the credentials on the constructor
var spotifyApi = new SpotifyWebApi({
  clientId : 'myClientId',
  clientSecret : 'myClientSecret'
});

// Get an access token and 'save' it using a setter
spotifyApi.clientCredentialsGrant()
  .then(function(data) {
    console.log('The access token is ' + data.body['access_token']);
    spotifyApi.setAccessToken(data.body['access_token']);
  }, function(err) {
    console.log('Something went wrong!', err);
  });

// Get tracks in a playlist
spotifyApi.getPlaylistTracks('thelinmichael', '3ktAYNcRHpazJ9qecm3ptn', { 'offset' : 1, 'limit' : 5, 'fields' : 'items' })
  .then(function(data) {
    console.log('The playlist contains these tracks', data.body);
  }, function(err) {
    console.log('Something went wrong!', err);
  });