I want to invite my friend/colleague/etc. to work with me on my app. How do I do that?

This is great news! All you have to do now is go to your Workspace page and click on the Users tab. There, you can invite or add an already existing user to your app by typing in either their email address or their username. The user then receives an email with your invitation and can join your app by clicking the link, provided in the email. Voila, you both can now collaborate on your app in real-time.