PasswordlessWebLogin/Program.cs

using Fido2NetLib;
using Microsoft.AspNetCore.Mvc;
using Passwordless;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddFido2(options =>
{
    options.ServerDomain = "localhost";
    options.ServerName = "FIDO2 Test";
    options.Origins = ["http://localhost:5172"];
    options.TimestampDriftTolerance = 300000;
});
builder.Services.AddTransient<CredentialManager>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseStaticFiles();
app.UseHttpsRedirection();

app.MapGet("/buildCredentialOptions", ([FromQuery] string login, CredentialManager credMan) => 
        credMan.BuildCredentialOptions(login))
    .WithName("BuildCredentialOptions")
    .WithOpenApi();

app.MapGet("/registerCredential", async ([FromQuery] string login, [FromBody] AuthenticatorAttestationRawResponse attestationResponse, CredentialManager credMan) => 
        await credMan.RegisterCredential(login, attestationResponse))
    .WithName("RegisterCredential")
    .WithOpenApi();

app.Run();