Calling Azure REST API from .Net Core native application by displaying the Azure Login Popup from C#

I was able to get the Azure REST APIs working using the following code from the Fluent NuGet Packages:

    private static string TestAuth()  
    {  
        // AzureCredentials credentials = new AzureCredentials(spLogin, TenantID, AzureEnvironment.AzureGlobalCloud);  
        var credentials = SdkContext.AzureCredentialsFactory.FromServicePrincipal(  
            ClientID,  
            ClientSecret,  
            TenantID,  
            AzureEnvironment.AzureGlobalCloud);  

        var client = RestClient  
            .Configure()  
            .WithEnvironment(AzureEnvironment.AzureGlobalCloud)  
            .WithCredentials(credentials)  
            .Build();  

        CancellationToken cancellationToken = new CancellationToken();  

        var request = new HttpRequestMessage(HttpMethod.Get, $"https://management.azure.com/subscriptions/{SubscriptionID}/resourcegroups/{ResourceGroupName}?api-version=2019-10-01");  
        client.Credentials.ProcessHttpRequestAsync(request, cancellationToken).GetAwaiter().GetResult();  
        var httpClient = new HttpClient();  
        var response = httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken).GetAwaiter().GetResult();  

        return response.Content.ReadAsStringAsync().GetAwaiter().GetResult();  
    }