@type t() :: %PolarExpress.Schemas.IntrospectTokenResponse{
  active: boolean() | nil,
  aud: String.t() | nil,
  client_id: String.t() | nil,
  exp: integer() | nil,
  iat: integer() | nil,
  iss: String.t() | nil,
  scope: String.t() | nil,
  sub: String.t() | nil,
  sub_type: PolarExpress.Schemas.SubType.t() | nil,
  token_type: String.t() | nil
}