Email is not sent to user's email address in *.js

I am going to send 5 digits to user’s email address. But it is not being sent.
Here is codebase below.

const mailOptions = {
  from: 'example@gmail.com',
  to: email,  
  subject: 'Password Reset Token',
  text: `Your password reset token is: ${token}`
};

transporter.sendMail(mailOptions, (error, info) => {
  if (error) {
    console.log(error);
    res.status(500).json({ message: 'Error sending email' });
  } else {
    console.log('Email sent: ' + info.response);
    res.json({ message: 'Token sent to email!' });
  }
});

Please let me know what I should fix.

I couldn’t see any emails were sent. Please let me know the issues. Thanks.

>Solution :

You have to use google app password to send an email by using the gmail.

https://support.google.com/accounts/answer/185833?hl=en

I think you used normal password for the your mailer.