the version of the discord library with support for this isn't
necessarily stable, so normal ! commands will still be available. The
user is no longer DMed for the PIN, instead they type /pin <PIN>.
PIN is verified but not used currently. Works a little different than
the others, you input your matrix user ID and then the PIN is sent to
you. The bot doesn't support E2EE, so the bot being the first one to
message ensures the chat is unencrypted.