Get Current User in a component

I'm starting a new site with Blazor and Windows Authentication and need to identify the current user viewing the page/component.

For a Razor Page, the current user name can be accessed with Context.User.Identity.Name, but that doesn't seem to work in a Blazor component. I've tried injecting HttpContext into the component but the Context is null at runtime.

As a bonus, I will eventually want to incorporate this into Startup.cs so I only need to get the username once and can leverage a corporate user class (with EF Core) for my applications. Answers tailored to that use case would also be appreciated.

For me the solution mentioned in the first answer 2. option worked perfect: I am using Blazor server side on .Net Core 5.0 . I injected

@inject AuthenticationStateProvider GetAuthenticationStateAsync

in my Blazor page and added the following in the code section:

protected async override Task OnInitializedAsync()
    {
        var authstate = await GetAuthenticationStateAsync.GetAuthenticationStateAsync();
        var user = authstate.User;
        var name = user.Identity.Name;
    }

In my startup.cs, I have the following lines:

services.AddScoped<ApiAuthenticationStateProvider>();
services.AddScoped<AuthenticationStateProvider>(p =>
                p.GetRequiredService<ApiAuthenticationStateProvider>());