@type t() :: %ExSaml.Core.LogoutRequest{
  destination: String.t(),
  issue_instant: String.t(),
  issuer: String.t(),
  name: String.t(),
  name_format: String.t() | nil,
  name_qualifier: String.t() | nil,
  reason: :user | :admin | :unknown,
  session_index: String.t(),
  sp_name_qualifier: String.t() | nil,
  version: String.t()
}