@JohnPhilpin So when you turn on ActivityPub support, you choose whatever username you want to show up on Mastodon. For simplicity's sake I went with the same username you use on micro.blog (so I'm now @droct), but it's up to you. Keep in mind it'll be a new account, separate from your existing Mastodon account. But you can make the front part of your username (the part before the domain) anything you want.