How create log off for Cognito in Blazor server ?

Could you please give me code snippet for log off functionality in Blazor Server?

I have already completed the log in using cognito service. But Logoff on button click is not working.

I have configure the logout in cognito like this https://localhost:[port]/SignedOut

I have done poc using Blazor Server 8.0, C# and using Microsoft.AspNetCore.Authentication.OpenIdConnect approach. Like this post

https://davidpallmann.hashnode.dev/hello-cognito-oidc