Security
Your password, and a second step at sign-in.
Password
You will be asked for your current password, then the new one.
Forgotten it instead? Ask for a reset link — that one goes to your email and does not need the old password.
Delete my account
This closes your account permanently and signs you out everywhere. Your purchases and access to them are lost and cannot be restored. Medical and payment records are retained where the law requires — see what is deleted and what is kept.