How do I apply hangfire dashboard open free for all?

I know that hangfire set it dashboard to local only for security purpose. Then if I want to open it in custom domain, I have to set authorization for it. I have followed the Configuring Authorization guide but I don’t understand what do I have to write inside app.UseCookieAuthentication(…) . I have tried

app.UseCookieAuthentication(new CookieAuthenticationOptions()
                AuthenticationScheme = "YourCookieInstanceName",
                AutomaticAuthenticate = true

But it’s said my namespace can’t be found for CookieAuthenticationOptions

Add a filter like this:

Authorization = new [] { new MyAuthorizationFilter() }

That returns true always.