Can not perform delete without auth options

[ken-kost]

delete from Document was not working for me without implementing a variant that includes auth options. I would get

{:error,
 %HTTPoison.Error{
   reason: {:tls_alert,
    {:unknown_ca,
     ~c"TLS client: In state wait_cert at ssl_handshake.erl:2138 generated CLIENT ALERT: Fatal - Unknown CA\n"}},
   id: nil
 }}

After trying my variant it worked. Am I missing something or is this missing? I could open a PR for that change if somebody gives me green light. 🟢