To get a list of the current locks on a folder in Box, call the
GET /folder_locks/ API with the id of the folder supplied as a folder_id
query string parameter.
Folder Locks
When using any folder lock API endpoints, you must be authenticated as the
owner/co-owner of the folder you are trying to access.
The id of any folder can be determined by visiting a folder in the web
application and copying the id from the URL. For example, for the URL
https://*.app.box.com/folder/123 the folder_id is 123.