Anyone here have experience with getting mutual TLS authentication working with an Elixir HTTP client?I have a CA file, certificate, and private key that work in a few other contexts with the request am trying to make:

• In Postman, using the built-in “Certificates” feature
• With curl, using --capath, --cert, and --key
• In Node.js, using the request-promise library

In terms of Elixir, I’ve tried with HTTPoison and Mint, setting the :ssl and :transport_opts options, respectively, to:

[
  certfile: @certfile,
  keyfile: @keyfile,
  cacertfile: @cacertfile
]

Mint times out on connect/4 and HTTPoison sends the request, which the server rejects.The relevant information I can extract from the 400 response that HTTPoison gets me is “400 The SSL certificate error”—not very helpful. I’ve reached out to the support team for the API I am working with, but I was hoping you folks might have some insight in the interim.

Thanks in advance!