Connection.Credentialsmodule Refresh_token : sig ... endRefresh_token credentials correspond to Reddit's "web app" and "installed-app" app types.
module Userless_confidential : sig ... endmodule Userless_public : sig ... endtype t = | Password of Password.t| Refresh_token of Refresh_token.t| Userless_confidential of Userless_confidential.t| Userless_public of Userless_public.t