error 403 when calling FoldersAPI > SearchFolderContentsAsync

[afshinjafari]

Hi,
I'm trying to use FoldersAPI search method agains BIM360 Docs project but while I can use other FoldersAPI methods and functions, the SearchFolderContentsAsync method returns '403' error.

Documentation of BIM360 Docs API suggests "403 -> The request was successfully validated but permission is not granted or the application has not been white-listed. Do not try again unless you solve permissions first." however I cannot find any settings / permissions that could help.
To set the Forge APP access to BIM360 Docs project I've used this article:
https://forge.autodesk.com/en/docs/bim360/v1/tutorials/getting-started/manage-access-to-docs/

and this works well with accessing files and folders etc, but not search.

Here's the response content:
{"jsonapi":{"version":"1.0"},"errors":[{"id":"73a8fe00-19b1-43ad-9fe8-9f8eea6ced74","status":"403","code":"USER_NOT_AUTHENTICATED","detail":"The user could not be authenticated."}]}

Any help is appreciated.
Afshin

[watcherkb]

Maybe a little late, but you need to give right permissions/scopes
Scope.DataRead, Scope.DataCreate, Scope.DataWrite