import * as jsforce from "jsforce";

        var conn = new jsforce.Connection({

         loginUrl : 'https://login.salesforce.com'
      });
      var username = 'XXXXXXXXXXXXXX';
      var password = 'XXXXXXXXXXXXXXXXXXXXXX';
      conn.login(username, password, function(err, userInfo) {
        if (err) { return console.error(err); }

        console.log(conn.accessToken);
        console.log(conn.instanceUrl);
        // logged in user property
        console.log("User ID: " + userInfo.id);
        console.log("Org ID: " + userInfo.organizationId);

      });
// this part of code doesn't seem to work

conn.streaming.topic("InvoiceStatementUpdates").subscribe(function(message) {
  console.log('Event Type : ' + message.event.type);
  console.log('Event Created : ' + message.event.createdDate);
  console.log('Object Id : ' + message.sobject.Id);
});