Hey there!
We’ve built a forge app based on the assets platform from jsm. I have looked into following references Assets API: Get icon but I cannot understand how to fetch the icon from used objectType. I keep getting the same 403 forbidden or 401 (Unauthorized) status. Regarding to the documentation it is possible to get an icon by id and the response is pretty similar to listing objects on key values…objectType.icon
We want to fetch the icon to display it in our forge app. I greatly appreciate any kind of support! 
Thank you