This is absolutely insane. Sharing passwords is an unacceptable security practice. Only the account holder can accept updates to the terms and conditions. Without accepting the new terms, you can't release any updates to your app. Thus you are stuck either sharing passwords or your account holder has to be on call 24/7 (impossible).
Apple, there are huge companies that develop amazing apps that have made you billions or dollars. Not having basic user management for even small developer teams is unacceptable. What are you doing with all of our developer fees anyway?