PasswordlessWebLogin/OptionsCache.cs

using Fido2NetLib;
using Microsoft.Extensions.Caching.Memory;

namespace Passwordless;

public class OptionsCache
{
    private readonly IMemoryCache _cache;

    public OptionsCache(IMemoryCache cache)
    {
        _cache = cache;
    }

    public CredentialCreateOptions Get(string key)
    {
        return _cache.Get<CredentialCreateOptions>(key) ?? throw new Exception("Credential options not found - probably due to creation timeout");
    }

    public void Set(CredentialCreateOptions options)
    {
        _cache.Set(options.User.Name, options, TimeSpan.FromMinutes(5));
    }
}