Authentication goes through on twitter API, but when you hit a tweet endpoint, you get 403 forbidden.

 {"title": "Forbidden", "detail": "Forbidden", "type": "about:blank", "status":403}

//Variables for authentication
var apikey='xxx';
var apisecret = 'xxx';

vartwitter=TwitterWebService.getInstance(
  apikey, // API Key
  apisecret // API secret key
);
 
//Collaborate and authenticate apps
function authorize(){
  twitter.authorize();
}
 
// Unauthenticate
function reset() {
  twitter.reset();
}
 
// Callback after authentication
function authCallback (request) {
  return twitter.authCallback(request);
}


// Post Tweet
function postTweet(){
  
  varservice=twitter.getService();
  // varendPointUrl='https://api.twitter.com/1.1/statuses/update.json';
  varendPointUrl="https://api.twitter.com/2/tweets";
  
  var message = {
    // Text message body
    text:'Tweet Test'
  }

  var response=service.fetch(endPointUrl,{
    method: 'post',
    muteHttpExceptions—true,
    contentType: 'application/json',
    payload —JSON.stringify (message)
    // payload: { status: 'Tweet Test'}
  });

  console.log(response);
}