   iex> ExMoney.SaltedgeClient.request(:post, "logins", body)
   """
   def request(method, endpoint, body \\ "") do
+    client_id = Application.get_env(:ex_money, :saltedge_client_id)
+    service_secret = Application.get_env(:ex_money, :saltedge_service_secret)
+
     url = @base_url <> endpoint
     str_method = to_string(method) |> String.upcase
     request = "#{expires_at}|#{str_method}|#{url}|#{body}"

      {"Content-type", "application/json"},
      {"Expires-at", expires_at},
      {"Signature", signature(request)},
      {"Client-id", @client_id},
      {"Service-secret", @service_secret}
    ]

    {:ok, response} = HTTPoison.request(method, url, body, headers)

defmodule ExMoney.Saltedge.Client do
  @base_url "https://www.saltedge.com/api/v2/"

  @doc """
