In 4.2.0, the getKeyVault.createKey() method returns a WriteResult instead of the created key. This requires users to do one of two things:
- Search by key alternate name for the created key, or
- Search all keys in reverse creation order for the most recently created key
As noted in the spec document, data key creation methods should return at least the _id of the created document.
The 4.2 shell should either return the _id of the created data key per-spec.