@type t() :: %KMS.Fallbacks.PrincipalFallback{
  __meta__: term(),
  encrypted_principal_private_key: term(),
  ephemeral_public_key: term(),
  id: term(),
  inserted_at: term(),
  principal: term(),
  principal_id: term(),
  public_key: term(),
  public_key_id: term(),
  version: term()
}