Function parse_active_local_user_id 

pub(crate) async fn parse_active_local_user_id(
    services: &Services,
    user_id: &str,
) -> Result<OwnedUserId>

Parses user ID that is an active (not guest or deactivated) local user.

An account with an empty password reads as deactivated, which is how a guest is refused along with a deactivated account.