Unsubscribe from notifications

[jadsanders]

Allow the user to unsubscribe from all notifications (mails through the java backend, mails through the notification service) at a single unique point: https://www.sofort-impfen.de/waitlist/unsubscribe

[svettwer]

Current contract for blocking a mail address concerning notifications is:

{
  "jsonrpc": "2.0",
  "method": "removeMail",
  "params": {
    "data": "cb97080a28feeb94107dc9b1061a31653c0e4234ba3e4de3772c55cab1815e67"
  },
  "id": 42
}

The data field contains a string encoded SHA256 hashed mail address.