@type t() :: %KMS.Principals.Principal{
  __meta__: term(),
  encrypted_principal_private_key: term(),
  id: term(),
  inserted_at: term(),
  kind: term(),
  password: term(),
  password_hash: term(),
  principal_factors: term(),
  principal_private_key: term(),
  principal_public_key: term(),
  ref: term(),
  sessions: term(),
  tags: term(),
  updated_at: term(),
  username: term()
}