First Elixir Project (Probably terrible code)

Instead of using HttpPoison directly in your codebase, you can define a generic http client interface that is fully configurable.

Here is an example of a interface: lib/ssl_moon/network/http/http_client.ex · main · SSL MOON / SSL MOON · GitLab
And implementation: lib/ssl_moon/network/http/http_client_impl.ex · main · SSL MOON / SSL MOON · GitLab

If you plan on using that code, don’t mind the logic related to redirects as that is irrelevant in your case.