I am trying to implement LoginRadius for SSO onto expressjs web app but seems like there no relevant document available.
I found this document on LoginRadius beta docs. This would help you to implement SSO on your web app.
Link is going to home page of doc portal.
Welcome to LoginRadius Community
LoginRadius Provides you the IDX page for central authentication which is look like
https://<LoginRadius App Name>.hub.loginradius.com/auth.aspx
You can whitelist all your domains and can use this as a central authentication on your multiple websites.
You can also set SSO token manually by following this document:
Here is the updated link without beta: