text: const nodemailer = require('nodemailer');
  const pug = require('pug');
  const juice = require('juice');
  const htmlToText = require('html-to-text');
  const promisify = require('es6-promisify');
  
  const transport = nodemailer.createTransport({
      host: process.env.MAIL_HOST,
      port: process.env.MAIL_PORT,
      auth: {
          user: process.env.MAIL_USER,
          pass: process.env.MAIL_PASS
      }
  });
  
  const generateHTML = (filename, options = {}) => {
      const html = pug.renderFile(`${__dirname}./../views/email/${filename}.pug`, options);
      const inlined = juice(html)
      return inlined;
  }
  
  exports.send = async (options) => {
      const html = generateHTML(options.filename, options);
      const text = htmlToText.fromString(html);
      const mailOptions = {
          from: `Mekanlar <noreply@mekanlar.com`,
          to: options.user.email,
          subject: options.subject,
          html,
          text
      }
      const sendMail = promisify(transport.sendMail, transport);
      return sendMail(mailOptions);
  }
  