Possible to use system API key to get "hot" and "latest" topics for specific user?

Hi @sam oh, fantastic! What’s the endpoint, then? I do have an all-users system API key.

The normal endpoint, that gives me all latest, unfiltered:

/latest.json

User-specific endpoints that I’ve tried, that don’t work (where username is the name of a user in my forums):

/username/latest.json
/latest/username.json
/username/latest
/latest/username
/latest/4.json (using user ID instead of username)
etc.

I can’t seem to find it :-\