Yep

Shogi.Api/Controllers/UserController.cs

@@ -59,7 +59,7 @@ public class UserController : ControllerBase
     /// <returns></returns>
     [AllowAnonymous]
     [HttpGet("LoginAsGuest")]
-    public async Task<IActionResult> GuestLogin([FromQuery] string returnUrl)
+    public async Task<IActionResult> GuestLogin([FromQuery] string? returnUrl)
     {
         var principal = await this.claimsTransformation.CreateClaimsFromGuestPrincipal(User);
         if (principal != null)

Shogi.Api/Program.cs

@@ -43,7 +43,7 @@ namespace Shogi.Api
 
             app.UseWhen(
                 // Log anything that isn't related to swagger.
-                context => ShouldLog(context),
+                context => IsNotSwaggerUI(context),
                 appBuilder => appBuilder.UseHttpLogging());
 
             // Configure the HTTP request pipeline.
@@ -69,7 +69,7 @@ namespace Shogi.Api
 
             app.Run();
 
-            static bool ShouldLog(HttpContext context)
+            static bool IsNotSwaggerUI(HttpContext context)
             {
                 var path = context.Request.GetEncodedPathAndQuery();