GH OAuth callback in StdLib

main.js

/**
* Function to handle a Github OAuth callback 
* https://developer.github.com/apps/building-integrations/setting-up-and-registering-oauth-apps/about-scopes-for-oauth-apps/
* @param {string} code Required. The code you received as a response to Step 1.
* @param {string} state The unguessable random string you provided in Step 1.
* @returns {string}
*/
module.exports = (code, state, context, callback) => {
  const axios = require('axios')
  axios.post('https://github.com/login/oauth/access_token', {
    client_id: 'foo',
    client_secret: 'bar',
    code: code
  })
  .then(function (response) {
    callback(null, response.data);
  })
  .catch(function (error) {
    callback(error);
  });
};

could just .catch(callback) :)