Update the controller and the view for updated Link model.

lib/link_shortener_web/views/api/v1/link_view.ex

@@ -6,11 +6,11 @@ defmodule LinkShortenerWeb.Api.V1.LinkView do
     %{data: render_many(links, LinkView, "link.json")}
   end
 
-  def render("show.json", %{links: link}) do
+  def render("show.json", %{link: link}) do
     %{data: render_one(link, LinkView, "link.json")}
   end
 
-  def render("link.json", %{links: link}) do
+  def render("link.json", %{link: link}) do
     %{
       id: link.id,
       name: link.name,