vault_default_user_password: HASH_OF_DEFAULT_GNU_LINUX_USER_PASSWORD

vault_public_key_<USER>: |
  SSH_PUBKEY01_OF_<USER>
  SSH_PUBKEY02_OF_<USER>

vault_private_key_backup_ser_host: |
  SSH_PRIV_KEY_OF_backup_user_USER_ON_USER_HOST
vault_public_key_backup_user_host: SSH_PUBKEY_OF_backup_user_USER_ON_BACKUP_HOST