Here is the link to the documentation for the new SaaS Connectivity framework for IDN.
https://developer.sailpoint.com/idn/docs/saas-connectivity
This is currently in beta, so if you would like to start using this, please sign up here.
Check out a full-fledged example connector. Feel free to download and modify this code to help you develop your own connectors. https://github.com/sailpoint-oss/airtable-example-connector
Need help implementing connectors using SaaS Connectivity? Head on over to the developer forum.