Applies or update a watermark on a folder.
The access token received from the authorization server in the OAuth 2.0 flow.
The unique identifier that represent a folder.
The ID for any folder can be determined
by visiting this 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.
The root folder of a Box account is
always represented by the ID 0.
The watermark to imprint on the folder.
Returns an updated watermark if a watermark already existed on this folder.
A watermark is a semi-transparent overlay on an embedded file preview that displays a viewer's email address or user ID and the time of access over a file's content.