tul!showuser
- Reveal the user that sent a tupper message. Reply to a message to query that message, otherwise the most recent proxied message is used.
tul!showuser <message>
- Reveal the user that sent a message specified by message link or ID.

Note: Tupperbox has a configurable prefix. In command examples above, replace tul! with your server's Tupperbox prefix where necessary.

You can also use this command by reacting to any proxied message with ❓.

tul!showuser