@type input() ::
  ArchAstro.JSON.object() | %{optional(atom()) => ArchAstro.JSON.t()} | struct()

@type t() :: %ArchAstro.Auth.TokenSet{
  access_token: String.t(),
  expires_at: DateTime.t() | integer() | nil,
  expires_in: non_neg_integer() | nil,
  refresh_token: String.t() | nil,
  user: ArchAstro.Types.User.t() | nil
}