Trying to use Google auth in Web API

builder.Services
    .AddAuthentication(opt =>
    {
        opt.DefaultAuthenticateScheme = GoogleDefaults.AuthenticationScheme;
        opt.DefaultChallengeScheme = GoogleDefaults.AuthenticationScheme;
    })
    .AddGoogle(opt =>
    {
        opt.ClientId = builder.Configuration["Authentication:Google:ClientId"];
        opt.ClientSecret = builder.Configuration["Authentication:Google:ClientSecret"];
    });