What I want to search for is "user".
What I want to get is "results (results)" in the return value of /api/v2/users/search.
The result of the return value UsersSearchResponse will be null.
→I don't know how to specify "query" for BODY "at runtime.
Please let me know if there is any information that can be used as a reference for the search conditions.
What criteria are you wanting to search for users by?
There are multiple API that can find users based on what you want them for/by, and some things just aren't possible, so would have to know exactly what you're trying to achieve, not how you think you need to achieve it.
Example: If you just want all users you do not need user search API, you can just use GET /api/v2/users