I have a son who is under 13yo. We have family subscription. I would like him to use our family subscription. When I look for him on my phone/account it doesn’t let me find him (neither his screen name assigned by HomeCourt nor his email). I ended up signing into the adult account on the phone, but he can switch to my profile which would allow him to change account details. How do assign him to my family but not give him access to account details?