callBizApi.js

import { curry } from 'ramda';

const makeRequest = curry((endpoint, tokenResponse) => {
  const token = bizApi.accessToken.create(tokenResponse);
  const accessToken = token.token.access_token;

  return bizApi.api('GET', endpoint, { access_token: accessToken });
});

/**
 * Makes a GET request to the Business API
 * @param {string} endpoint The endpoint we wish to call
 * @returns {Promise} A promise containing the requested data
 */
const callBizApi = (endpoint: string): Promise<any> => {
  return requestToken(credentials).then(makeRequest(endpoint));
};