HTTPoison multipart post

Here are the responses when sent to httpbin.org/anything. Converted to elixir map.

This is the json response from the curl request

%{
  "args" => %{},
  "data" => "",
  "files" => %{"file" => "<<BASEENCODED IMAGE FILE>>"},
  "form" => %{
    "from" => "5555555555",
    "orgid" => "1234567890987654321",
    "to" => "1234"
  },
  "headers" => %{
    "Accept" => "*/*",
    "Authorization" => "Bearer asupersecretkey",
    "Content-Length" => "258300",
    "Content-Type" => "multipart/form-data; boundary=------------------------ef42181273f52b98",
    "Host" => "httpbin.org",
    "User-Agent" => "curl/7.79.1",
    "X-Amzn-Trace-Id" => "Root=1-62e052b9-5df66f172fe5904b220380f3"
  },
  "json" => nil,
  "method" => "POST",
  "origin" => "my.ip.ad.dr",
  "url" => "https://httpbin.org/anything"
}

This is the response from HTTPoison

%{
  "args" => %{},
  "data" => "",
  "files" => %{"file" => "<<BASEENCODED IMAGE FILE>>"},
  "form" => %{
    "from" => "5555555555",
    "orgid" => "1234567890987654321",
    "to" => "1234"
  },
  "headers" => %{
    "Authorization" => "Bearer asupersecretkey",
    "Content-Length" => "258518",
    "Content-Type" => "multipart/form-data; boundary=---------------------------jtlqvenjbyxkxrrs",
    "Host" => "httpbin.org",
    "User-Agent" => "hackney/1.18.1",
    "X-Amzn-Trace-Id" => "Root=1-62e051d5-6dae5f9e5b2a020d6ad368dd"
  },
  "json" => nil,
  "method" => "POST",
  "origin" => "my.ip.ad.dr",
  "url" => "https://httpbin.org/anything"
}