Return bytes from handler and mark it as binary

[YouKnow-sys]

Hi, how can we specify that our response contain bytes? I tried to do something like this

#[utoipa::path(
    get,
    path = "/export",
    responses(
        (
            status = StatusCode::OK,
            description = "file to download",
            body = [u8],
            content_type = "application/octet-stream"
        ),
    ),
)]

but it didn't work and the resulted openapi schema wasn't what I was after... so any idea?