Use Axway Hyperloop to perform OAuth-sessions with the iOS 11+ API "SFAuthenticationSession"

titanium-auth-session.js

const SFAuthenticationSession = require('SafariServices/SFAuthenticationSession');
const NSURL = require('Foundation/NSURL');

const session = SFAuthenticationSession.alloc().initWithURLCallbackURLSchemeCompletionHandler(
  NSURL.alloc().initWithString('https://github.com/login/oauth/authorize?scope=repo&client_id=XXXXX'), 
  'appcgithub://', 
  function(url, error) {
    if (error != null) {
      Ti.API.error('Error performing OAuth: ' + error.localizedDescription);
      cb({ success: false, error: 'Error performing OAuth: ' + error.localizedDescription });
      return;
    }
		
  cb({ success: true, url: url.absoluteString });
});

function cb(e) {
  Ti.API.info(e);
}