src/auth/ClientCredentialsFlow.js

/**
 * Implements the client credentials flow. Used for accessing APIs that don't need any KKBOX
 * user's personal data.
 * @see https://docs-en.kkbox.codes/docs/getting-started
 */
export default class ClientCredentialsFlow {
  /**
   * @ignore
   */
  constructor(token) {
    /**
     * @ignore
     */
    this.token = token;
  }

  /**
   * Fetch access token.
   *
   * @return {Promise}
   * @example auth.clientCredentialsFlow.fetchAccessToken();
   */
  fetchAccessToken() {
    return this.token.fetchAccessToken({
      grant_type: 'client_credentials'
    });
  }
}