Requesting the current user from the REST API yields an empty accountType

Issue Summary

The accountType field is empty when calling a specific REST API.

Steps to Reproduce

1. Log in to a Confluence tenant.
2. Change the path to wiki/rest/api/search/user?expand=operations&cql=user=currentUser()

Expected Results

(a) The accountType field is populated

(b) An operations field is returned

Actual Results

(a) The accountType field is an empty string.

(b) No operations are returned.

Workaround

None