To change your Username, navigate to your Profile settings here: splice.com/profile/settings

Click the "Edit" pencil at the far right of the Profile page and you can input a new username into the textbox next to "Username". Click "Save Changes" and you're all set!

As a reminder, you can only change your username once every 30 days, so make sure to pick a name you're happy with. Also, if a username is already in use, you'll see a "Username taken" error at the bottom of the textbox.