Here is the link to the documentation for the new SaaS Connectivity framework for IDN.
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.