co-owner invalid value for role parameter when creating a collaborator.

Documentation: says: https://api.box.com/2.0/collaborations \
-H "Authorization: Bearer ACCESS_TOKEN" \
-d '{"item": { "id": "FOLDER_ID", "type": "folder"}, "accessible_by": { "id": "USER_ID", "type": "user" }, "role": "editor"}' where 'co-owner' is a valid value.

[Endpoint=https://api.box.com/2.0/collaborations, Method=POST]

request body = {"item":{"id":"removed for privacy62","type":"folder"},"accessible_by":{"login":"***@example.com","type":"user"},"role":"co-owner"}

The Box API responded with a 400 : Bad Request{"type":"error","status":400,"code":"bad_request","context_info":{"errors":[{"reason":"invalid_parameter","name":"role","message":"Invalid value 'Co-owner'."}]},"help_url":"http:\/\/developers.box.com\/docs\/#errors","message":"Bad Request","request_id":"removed for privacy75807b366787f0"}