Merge pull request 'Passing token hint during signout' (#92) from payments into master

Reviewed-on: #92

LiteCharms.Features/Extensions/Api.cs

@@ -104,12 +104,15 @@ public static class Api
 
         app.MapGet("/logout", async (HttpContext context) =>
         {
-            await context.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+            var idToken = await context.GetTokenAsync("id_token");
 
-            await context.SignOutAsync(OpenIdConnectDefaults.AuthenticationScheme, new AuthenticationProperties
+            var authProperties = new AuthenticationProperties { RedirectUri = "/", };
-            {
+
-                RedirectUri = "/",
+            if (!string.IsNullOrEmpty(idToken)) 
-            });
+                authProperties.Parameters.Add("id_token_hint", idToken);
+
+            await context.SignOutAsync(OpenIdConnectDefaults.AuthenticationScheme, authProperties);
+            await context.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
         });
 
         return app;