def index(conn, _params) do
    conn
    |> PhxIzitoast.success("Success", "This is a Success message", position: "center")
    |> PhxIzitoast.warning("Warning", "This is a warning Message", position: "bottomRight")
    |> PhxIzitoast.error("Error", "This is an Error", position: "bottomLeft")
    |> PhxIzitoast.info("Notice", "This is a Notice", position: "topRight")
    |> PhxIzitoast.message("I am a  Message, Peace")
    |> render("index.html")
  end

iex> AtEx.send_sms(%{to: "+254724540039",     message: "Yes Bana"})
{:ok,
        %{
          "SMSMessageData" => %{
          "Message" => "Sent to 1/1 Total Cost: ZAR 0.1124",
          "Recipients" => [
          %{
           "cost" => "KES 0.8000",
           "messageId" => "ATXid_96e52a761a82c1bad58e885109224aad",
           "number" => "+254724540039",
           "status" => "Success",
           "statusCode" => 101
          }
          ]
        }
      }}

 iex> AtEx.USSD.build_response("What do you want to order", ["Chips & Sausage", "Burger & Chips", "Rice & beans"])
{:ok, "CON What do you want to order\n1. Chips & Sausage\n2. Burger & Chips\n3. Rice & beans" }

    iex> Mpesa.make_request(10, "254724540039", "reference", "description")
      {:ok,
        %{
        "CheckoutRequestID" => "ws_CO_010320202011179845",
        "CustomerMessage" => "Success. Request accepted for processing",
        "MerchantRequestID" => "25558-10595705-4",
        "ResponseCode" => "0",
        "ResponseDescription" => "Success. Request accepted for processing"
        }}

        {:error, "Invalid Access Token"}