Adding delete for spawnables

GameAuthApi.Tests/SpawnableControllerTests.cs

@@ -54,4 +54,16 @@ public class SpawnableControllerTests
         var ok = Assert.IsType<OkObjectResult>(result);
         Assert.Equal(list, ok.Value);
     }
+
+    [Fact]
+    public async Task Delete_NotFound()
+    {
+        var svc = new Mock<SpawnableService>(config);
+        svc.Setup(s => s.GetByIdAsync("id")).ReturnsAsync((Spawnable)null);
+        var controller = new SpawnableController(svc.Object);
+
+        var result = await controller.Delete("id");
+
+        Assert.IsType<NotFoundObjectResult>(result);
+    }
 }