/**
 * Newsletter opt-in / opt-out
 *
 * @param {string} email            The email of the user to opt-in/out
 * @param {boolean} [optIn=true]    Whether to opt-in/out
 * @param {object} [data=undefined] Custom data to send
 *
 * @module masterdata
 *
 * @example
 *  const response = await newsletterOptIn({
 *    email: 'john@doe.com',
 *    data: {
 *      firstName: 'John Doe',
 *      ...
 *    },
 *  });
 *
 * @return {promise}
 */
declare const newsletterOptIn: ({ email, optIn, data, auth, accountName, an, }: INewsletterOptInArgs) => Promise<IResponse>;
export default newsletterOptIn;