Elixir - send SMS with Twilio through Hackney

twilio_send_sms.ex

text = "sms text"
opts = [follow_redirect: true, basic_auth: {@account_sid, @auth_token}]
base_url = "https://api.twilio.com/2010-04-01/Accounts/#{@account_sid}/Messages.json"
payload = "Body=#{text}&From=#{@number_from}&To=#{number_to}"
headers = ["Content-Type": "application/x-www-form-urlencoded"]
case :hackney.request(:post, base_url, headers, payload, opts) do
  {:ok, 201, _hs, _ref} ->
    json(conn, %{message: "Message sent successfully!"})
  {:error, reason} ->
    send_resp(conn, 500, Jason.encode!(%{message: reason}))
  {:ok, code, _hs, ref} ->
    {:ok, body} = :hackney.body(ref)
    send_resp(conn, code, body)    
end