src/auth/Auth.js

import ClientCredentialsFlow from './ClientCredentialsFlow';
import TokenFetcher from './TokenFetcher';

/**
 * Implements various KKBOX OAuth 2.0 authorization flows.
 */
export default class Auth {
  /**
   * Initialize the Auth object with client id and client secret.
   *
   * @param {string} clientID
   * @param {string} clientSecret
   * @example new Auth(clientID, clientSecret);
   */
  constructor(clientID, clientSecret) {
    /**
     * @type {TokenFetcher}
     */
    this.tokenFetcher = new TokenFetcher(clientID, clientSecret);

    /**
     * @type {ClientCredentialsFlow}
     */
    this.clientCredentialsFlow = new ClientCredentialsFlow(this.tokenFetcher);
  }
}