fix(is): LicenseUsageSummary resolution

Fixed usage in the main host of the LicenseUsageSummary so that it is resolved at shutdown properly.

hosts/main/Program.cs

@@ -1,5 +1,6 @@
 // Copyright (c) Duende Software. All rights reserved.
 // See LICENSE in the project root for license information.
+#pragma warning disable IDE0058 // Expression value is never used
 
 using Duende.IdentityServer.Licensing;
 using IdentityServerHost;
@@ -38,12 +39,14 @@
         .ConfigureServices()
         .ConfigurePipeline();
 
-    var usage = app.Services.GetRequiredService<LicenseUsageSummary>();
+    app.Lifetime.ApplicationStopping.Register(() =>
+    {
+        var usage = app.Services.GetRequiredService<LicenseUsageSummary>();
+        Console.Write(Summary(usage));
+        Console.ReadKey();
+    });
 
     app.Run();
-
-    Console.Write(Summary(usage));
-    Console.ReadKey();
 }
 catch (Exception ex)
 {
@@ -55,7 +58,7 @@
     Log.CloseAndFlush();
 }
 
-string Summary(LicenseUsageSummary usage)
+static string Summary(LicenseUsageSummary usage)
 {
     var sb = new StringBuilder();
     sb.AppendLine("IdentityServer Usage Summary:");
@@ -67,4 +70,3 @@ string Summary(LicenseUsageSummary usage)
 
     return sb.ToString();
 }
-