Another company is developing my app for my business, and they said they would need my Apple Developer Account to upload the app to the Apple Store. However, I assume they mean that I would need to actually give them the username and password to my account itself which I don't want to do. Also, as I'm the Admin and Account Holder, I see that I can manage a team. My question is that how exactly do I add them to my team, and what role should I give them that will allow them to upload the app as well as future updates of it to the Apple Store but nothing more than that?