Google oauth 2.0 API password change Username and Password not accepted

@sambellerose I went from

const generator = xoauth2.createXOAuth2Generator({
  user: serverConfig.gmail.client_user,
  clientId: serverConfig.gmail.client_id,
  clientSecret: serverConfig.gmail.secret,
  refreshToken: serverConfig.gmail.refresh_token,
  accessToken: serverConfig.gmail.access_token,
});


const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    xoauth2: generator,
  },
});

To just having the following:

const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    type: 'OAuth2',
    user: serverConfig.gmail.client_user,
    clientId: serverConfig.gmail.client_id,
    clientSecret: serverConfig.gmail.secret,
    refreshToken: serverConfig.gmail.refresh_token,
    accessToken: serverConfig.gmail.access_token,
  },
});

I hope this helps

I solved this by updating to latest version of Nodemailer, and remove xoauth2 module as Nodemailer 3 has better Oauth 2 support. Going on Google Oauth 2.0 playground I able to get correct access and refresh tokens.