text: const jwt = require('jsonwebtoken');
  
  const secret = process.env.NODE_ENV === 'production' ? process.env.JWT_SECRET : 'secret';
  
  const authService = () => {
    const issue = payload => jwt.sign(payload, secret, { expiresIn: 10800 });
    const verify = (token, cb) => jwt.verify(token, secret, {}, cb);
  
    return {
      issue,
      verify,
    };
  };
  
  module.exports = authService;
  