autodesk forge – Failure to get the content of an ACC folder with folders/:folderid/contents endpoint

I am trying to get the contents of a folder, specifically the ‘Project Files’ folder in ACC.

I am using postman at the moment and did the following :

• Got the Hubs, via projects/v1/hubs endpoint and extracted the hubId of the desired hub
• Got the Projects, via /hubs/:hubid/projects endpoint and extracted the projectId
• Got the TopFolders, via hubs/hubid/projects/project_id/topFolders endpoint, extraced the folderId
  for ‘Project Files’
• Trying to get the content of the ‘Project Files’ content via projects/project_id/folders/folderId/contents and I get an error “developerMessage”: “The requested resource does not exist.”

The folderId I am getting is from of “urn:adsk.wipprod:fs.folder:co.bEd9KCbyQAWbhE938Cy48Q” (I changed one of the characters here)

Any ideas welcome
Thanks Jonathan