IOptionsMonitor<MyOptions> contains empty options when HandleAuthenticateAsync() is called

Question

I've created my own authentication handler in ASP.NET Core MVC v2.0.

It is invoked OK, but the options object is empty when the HandleAuthenticateAsync method is invoked.

Startup config

authenticationBuilder.AddSingleSignOn("SingleSignOn", options =>
{
    options.OpenGlobalDb = () => OpenGlobalConnection(configuration);
    options.OpenTenantDb = orgId => OpenTenantDb(configuration, orgId);
    options.AuthenticationScheme = "Cookies";
});

(I've had a breakpoint in the code and it's invoked)

The authentication handler

public class SingleSignOnAuthenticationHandler : AuthenticationHandler<SingleSignOnAuthenticationOptions>,
    IAuthenticationRequestHandler
{

    private IOptionsMonitor<SingleSignOnAuthenticationOptions> _options;

    public SingleSignOnAuthenticationHandler(IOptionsMonitor<SingleSignOnAuthenticationOptions> options,
        ILoggerFactory logger, UrlEncoder encoder, ISystemClock clock) : base(options, logger, encoder, clock)
    {
        _options = options;
    }

    protected override async Task<AuthenticateResult> HandleAuthenticateAsync()
    {
        // _options.CurrentValue.OpenGlobalDb is null here.
    }

    //[.. all other methods ..]
}

Auth builder extensions

public static class AuthenticationBuilderExtensions
{
    public static AuthenticationBuilder AddSingleSignOn(this AuthenticationBuilder builder, string authenticationScheme, Action<SingleSignOnAuthenticationOptions> configureOptions)
    {
        return builder.AddScheme<SingleSignOnAuthenticationOptions, SingleSignOnAuthenticationHandler>(authenticationScheme, "SingleSignOn authentication", configureOptions);
    }
}

Answer 1

Do not save an own version of the options object in the constructor. Use the Options property in the HandleAuthenticateAsync method instead.