I need a little help getting my Bot's Channel ID so it can get verified

I’ve tried doing it on my browser with my bot’s username as the login parameter, but it still returns with a 401 and the same message. I thought using Linux would be better since I could use that Curl command.

As for why I need it verified, it’s so my bot can send whispers. The Bot I’m using, PhantomBot, has the option on the dashboard to sent all default command responses in a whisper, so, in turn, people can link their Discord with a code that is private, not open to the public with the chance to be used by someone else.