Im trying to implement the folowing call in Elixir:

curl -q -k --cert client-2048.crt --key client-2048.key
https://identitysso.betfair.com/api/certlogin -d
"username=testuser&password=testpassword" -H "X-Application:
curlCommandLineTest"

This is what I have so far:

defmodule BfgEngine.Client.Betfair do
alias BfgEngine.API.Betfair.{Login}
def login(%{username: username, password: password, certs: certs}) do
body = %{username: username, password: password}
Login.post("/certlogin", body)
|> IO.inspect()
end
end

defmodule BfgEngine.API.Betfair.Login do
use HTTPoison.Base

@base_url " https://identitysso.betfair.com/api"

@expected_fields ~w(sessionToken loginStatus)

def process_url(resource) do
@base_url <> resource
end

def process_request_headers(_headers) do
[
“X-Application”: “1”,
“content-type”: “application/x-www-form-urlencoded”,
“Accept”: “Application/json; Charset=utf-8”
]
end

def process_response_body(body) do
body
|> Poison.decode!()
|> Map.take(@expected_fields)
|> Enum.map(fn {k, v} -> {String.to_atom(k), v} end)
end

def process_request_body(%{username: username, password: password}) do
“username=#{username}&password=#{password}”
|> URI.encode_www_form()
end

def process_request_options(_options) do
[
ssl: [
certfile: “/certs/client-2048.pem”,
keyfile: “/certs/client-2048.key”
]
]
end
end

However in the repl im getting the following error:

Interactive Elixir (1.6.6) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> BfgEngine.API.Betfair.Login.start
{:ok, []}
iex(2)> BfgEngine.Client.Betfair.login(%{password: “///////”, username: “/////”, app_key: “//////”, certs: “”})
** (exit) :badarg
(kernel) gen_tcp.erl:153: :gen_tcp.connect/4
(hackney) /Users/henriklarsson/repos/elixir/bfg_engine/deps/hackney/src/hackney_connect.erl:247: :hackney_connect.do_connect/5
(hackney) /Users/henriklarsson/repos/elixir/bfg_engine/deps/hackney/src/hackney_connect.erl:37: :hackney_connect.connect/5
(hackney) /Users/henriklarsson/repos/elixir/bfg_engine/deps/hackney/src/hackney.erl:316: :hackney.request/5
(httpoison) lib/httpoison/base.ex:630: HTTPoison.Base.request/9
(bfg_engine) lib/bfg_engine/betfair.ex:27: BfgEngine.Client.Betfair.login/1

Now my questions are:

1. What causes this error.
2. Is this a good way of implementing a rest client?
3. Are there any other problems with this implementation to get it working in the same way as the curl?