title: single sign on for multiple nodejs applications
body: <p>We have 3 nodejs web application running on same domain name on same vps with multiple subdomains and implementing passport authentication for each. We wanted single user be able to access all application with single account and for that we have added accounts.example.com as fourth application solely for purpose of account management. The requirement is - once user is authenticated in accounts.example.com, how to enable user to access rest of the three web application with that session.</p>