Uses local redirect for authorization.

Changes from `RedirectToRoute` to `LocalRedirect` for the
authorization endpoint to improve security and ensure the
redirect stays within the application's domain.

Source/ProofOfConcept/Program.cs

@@ -238,7 +238,7 @@ if (app.Environment.IsDevelopment())
         logger.LogCritical("User has access_token: {access_token} and refresh_token: {refresh_token}", access_token, refresh_token);
         
         if (String.IsNullOrEmpty(access_token))
-            return Results.RedirectToRoute("/Authorize");
+            return Results.LocalRedirect("/Authorize");
 
         HttpClient client = httpClientFactory.CreateClient();
         client.BaseAddress = new Uri("tesla_command_proxy");