endpoint.ex

defmodule MyAppWeb.Endpoint do
  use Phoenix.Endpoint, otp_app: :my_app
  use SiteEncrypt.Phoenix

  @impl Phoenix.Endpoint
  def init(_key, config) do
    {:ok, SiteEncrypt.Phoenix.configure_https(config)}
  end

  @impl SiteEncrypt
  def certification do
   SiteEncrypt.configure(
     client: :native,
     domains: ["<YOUR_DOMAIN.COM>", "<WWW.YOUR_DOMAIN.COM>"],
     emails: ["<YOUR_EMAIL>"],
     db_folder: Application.get_env(:my_app, :cert_path, "tmp/site_encrypt_db"),
     directory_url:
       case Application.get_env(:my_app, :cert_mode, "local") do
         "local" -> {:internal, port: 4002}
         "staging" -> "https://acme-staging-v02.api.letsencrypt.org/directory"
         "production" -> "https://acme-v02.api.letsencrypt.org/directory"
       end
   )
 end
 
 # The rest of the file that was already there
end