Hi, i just checked your Twitch channel with /mods
You have to mod Nightbot in your Twitch channel. Go to https://beta.nightbot.tv/dashboard and click on “join channel” to activate Nightbot for your channel. After that type /mod nightbot in your Twitch chat to make nightbot a moderator in your Twitch channel. Your custom commands should work/respond after that. Have a nice day.