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

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.