404 returned using Google and Cookie authentication on ASP.NET Core

[yopez83]

Here is my setup for a bear bones Web API. The WeatherForecast controller has the Authorize attribute on the Get endpoint.

    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();

            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
                .AddCookie();

            services.AddAuthentication()
                .AddGoogle(options =>
                {
                    var googleAuthNSection = Configuration.GetSection("Authentication:Google");

                    options.ClientId = googleAuthNSection["ClientId"];
                    options.ClientSecret = googleAuthNSection["ClientSecret"];
                });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseCookiePolicy();

            app.UseAuthentication();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }

and here is my error response

[Tratcher]

Change:

services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)

To:

            services.AddAuthentication(sharedOptions =>
            {
                sharedOptions.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                sharedOptions.DefaultChallengeScheme = GoogleDefaults.AuthenticationScheme;
            })

[yopez83]

@Tratcher it works. Thank you. I also opened #21719, which is my ultimate goal, but for some reason I cannot get it to work. I'm closing this, since it works.