Data Access API documentation unclear

[pameyer]

http://guides.dataverse.org/en/latest/api/dataaccess.html lists /api/access/datafile/$id (from context, $id refers to database ID of the file (reported by DB queries or api/datasets/:persistentId/ endpoint under files.dataFile.id).

curl -X GET -H "X-Dataverse-key: ${admin_key}" "${dataverse_host}/api/access/datafile/${file_db_identifier}&format=original" returns 404.

Possibly related: #3325 , #2174.

Not currently clear if this is a documentation bug, user error, or API bug.

[pameyer]

Documentation bug - curl -X GET -H "X-Dataverse-key: ${admin_key}" "${dataverse_host}/api/access/datafile/${file_db_identifier} works (on both published and unpublished data files; and for future reference X-Dataverse-key not needed for published/unrestricted files).

[pameyer]

Thanks to clarification from @pdurbin , this was due to incorrect specification of query parameters.