Google Apps Script Web App authenticate on external website

Question

I need to implement a Google Apps Script app that is used to login on a website and then if the authentication process succeed on that website the user should receive a mess

Answer 1

Fixed this by adding headers option:

  var headers = {
    'Connection':'keep-alive',
    'Content-Type':'application/json;charset=utf-8',
    'Accept':'application/json, text/plain, */*',
    'Cookie':'...',
  }