Google authenticating in C# code ASP.NET

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ASP.NET

Google

authentication

In below code I am trying to authenticate in C#.

UserCredential credential;
       ClientSecrets cs = new ClientSecrets() { ClientId = "client-id.apps.googleusercontent.com", ClientSecret = "somesecret" };

       credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
           cs,
           Scopes,
           "user",
           CancellationToken.None,
           null).Result;

Above code is pretty standard below is the setting I have done when I run the application (IIS Express) it runs on “http://localhost:54247/ which i have entered in Authorised redirect URL and Authorised javascript origins.



When I run the above code AuthorizeAsync() gives me below error. The port in the error changes everytime, seems like it is at the run time.
redirect_uri_mismatch
the redirect uri in the request http://127.0.0.1:58821/authorize/, does not match....

If there any setting I’ve missed or am I doing it wrong pls advice.

What I have tried:

I have tried different combinations using client_secret.json and different port publishing on local iis but nothing worked