Issue Summary

Find users and groups endpoint is not returning both users and groups when query param is empty.
if query= is used only groups are returned
if query=”” is used only users are returned

https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-group-and-user-picker/#api-rest-api-3-groupuserpicker-get

/rest/api/3/groupuserpicker

Steps to Reproduce

1. Make a call to the endpoint mentioned above with query=
2. confirm only groups are returned
3. a call to the endpoint mentioned above with query=””
4. Confirm only users are returned

Expected Results

Empty query should return both users and groups

Actual Results

depending on if the query is empty or a empty string it will return only users or only groups

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available