Heroku deployment: Corporate SSO usage

[davinci-kvs]

Hello

I am using wiki for company specific wiki. I have deployed it on Heroku, but wanted only the company's employees to login and connect to wiki.
I have an app which takes care of SSO authentication. But when I call that API @ server/index.js, it is not working. I have given code snippet below.
It may be because of the reason that the service starts at background and by the time user logs-in, everything is working.

// ----------------------------------------
// SSO Authentication
// ----------------------------------------
console.log('Authentication will happen through SSO')
const auth = require(<My_SSO_Module_Name>)
auth.authenticate(app);
// ----------------------------------------

Do suggest if there is any direct way of SSO authentication.

Thanks
Kumar Vikas Singh