This hosts bots for Darius Kazemi. Not you. Unless you're this Darius Kazemi in particular
Create a new ActivityPub Actor (account). Requires the admin user/pass on submit.
Enter an account name, its API key, and a message. This message will send to all its followers.
a long hex key you got when you created your account
Enter some JSON (just the object you're sending, not the Create wrapper object). Some payloads that work can be found here.