controller
  def step2(conn,  %{"post" => post_params}) do
IO.inspect(post_params)
 conn
 |> put_layout(false) |> render("step2.html", data: post_params)

  end

view
<%= @data[:toAddress][:postal_code] %>

value of inspect
%{"distance" => "0",
  "fromAddress" => %{"administrative_area_level_1" => "AZ",
    "country" => "United States", "locality" => "Phoenix",
    "postal_code" => "85029", "route" => "West Peoria Avenue",
    "street_number" => "3121"},
  "toAddress" => %{"administrative_area_level_1" => "AZ",
    "country" => "United States", "locality" => "Glendale",
    "postal_code" => "85301", "route" => "West Glendale Avenue",
    "street_number" => "4333"}}