numeric usernames coerced to numbers failing the CLI

[Rochet2]

1. The API sometimes returns username as a number instead of a string "username": 123123. this seems to happen for users that have a number as their username like this member https://civitai.com/user/2802169344506. So this might be a bug in the API where number in string coerces to number.
2. The CLI insists on username: string, typed-unmarshal fails, and it reports exit 1 / “unexpected response (status 200) when using civitai images search and encountering such a user.

Either the API or the CLI probably needs a fix.