Norbert on Nostr: Thanks, --test worked nicely. I'm new to ntfy and just realizing that the ...

Thanks, --test worked nicely. I'm new to ntfy and just realizing that the non-reserved topics available to non-paying users on ntfy.sh are global and public for all to subscribe to, so names must be hard to guess. Perhaps a default topic name (`sentrum`) is not a good idea, since it looks like users will receive each other's events?

I also found that the username and password fields are not required – messages are delivered on the default server without them. That's good as it matches my understanding of ntfy (you can send messages with curl without any credentials), but it means README.md is a bit inaccurate.