Fix Credo Design (AliasUsage): add aliases in lib

Add module aliases at top and use short names instead of
fully qualified nested modules across lib/.

lib/mv_web/live_user_auth.ex

@@ -6,6 +6,9 @@ defmodule MvWeb.LiveUserAuth do
   import Phoenix.Component
   use MvWeb, :verified_routes
 
+  alias AshAuthentication.Phoenix.LiveSession
+  alias Phoenix.LiveView
+
   # This is used for nested liveviews to fetch the current user.
   # To use, place the following at the top of that liveview:
   # on_mount {MvWeb.LiveUserAuth, :current_user}
@@ -15,7 +18,7 @@ defmodule MvWeb.LiveUserAuth do
     socket =
       socket
       |> assign(:return_to, return_to)
-      |> AshAuthentication.Phoenix.LiveSession.assign_new_resources(session)
+      |> LiveSession.assign_new_resources(session)
 
     {:cont, session, socket}
   end
@@ -29,14 +32,14 @@ defmodule MvWeb.LiveUserAuth do
   end
 
   def on_mount(:live_user_required, _params, session, socket) do
-    socket = AshAuthentication.Phoenix.LiveSession.assign_new_resources(socket, session)
+    socket = LiveSession.assign_new_resources(socket, session)
 
     case socket.assigns do
       %{current_user: %{} = user} ->
         {:cont, assign(socket, :current_user, user)}
 
       _ ->
-        socket = Phoenix.LiveView.redirect(socket, to: ~p"/sign-in")
+        socket = LiveView.redirect(socket, to: ~p"/sign-in")
         {:halt, socket}
     end
   end