'HttpContext' does not contain a definition for 'GetExternalProvidersAsync' or for 'IsProviderSupportedAsync'

I am making a web app with Steam login and I tried using the sample code but I can't use the 2 functions mentioned in the title. Am I missing a package or something? I added: builder.Services.AddAuthentication().AddSteam(); app.UseAuthorization(); app.UseAuthentication(); in the Program.cs.