Hi, I am planning to sign up for this feature and share my "family" with my sister, brother, and three other regular friends. I trust my friends, but is this safe to do? I have not tried the family feature yet, and I do not want to share anything (photos, music, files, app downloads, etc) with any of them except the right to use Apple Music. I also do not want them to be able to purchase things using my credit card without my permission. IS this possible?