No information given if `las --profile <profile> datasets get-documents <document-id>` is called with wrong document-id

[stinebuu]

When doing las --profile <profile> datasets get-documents <document-id> and there is something wrong with the document-id, or there are no documents present, no information is given. The only thing printed is

{
  "Total downloaded documents": 0
}

which is very little informative. It would be good if there could be some more hints about what is wrong.