 
   `Tuple` - `{:ok, sent_response}`
   """
-  def halt!(conn, opts // []) do
+  def halt!(conn, opts \\ []) do
     opts = [status: 401, message: ""] |> Keyword.merge opts
     conn |> send_resp(opts[:status], opts[:message])
   end


  `Tuple` - `{:ok, sent_response}`
  """
  def render(conn, template, opts // []) do
    opts = [status: 200] |> Keyword.merge opts

    conn = conn 
      |> put_resp_content_type(opts[:content_type] || MIME.Types.type("html")) 
      |> resp(opts[:status], body)
    conn |> send_resp
  end



  `Tuple` - `{:ok, sent_response}`
  """
  def not_found(conn, message \\ "Not Found") do
    conn |> send_resp(404, message)
  end

