I'm developing a webapp that uses hosted Feature Services in ArcGis Online. The feature services are created using the REST API. My problem now is how to dynamically add those items to the API key that my webapp uses. I basically need to find the REST API endpoint that does the same thing as I can do on the "Add items" section on the Dashboard API key page here https://developers.arcgis.com/api-keys . Does anyone have any good pointers?
