ASP.NET Core Get Current User Provider

CurrentUserProvider.cs

public interface ICurrentUserProvider
{
    Guid? GetCurrentUserId();
}

public class CurrentUserProvider : ICurrentUserProvider
{
    private readonly IHttpContextAccessor _httpContextAcessor;

    public CurrentUserProvider(IHttpContextAccessor httpContextAcessor)
        => _httpContextAcessor = httpContextAcessor;

    public Guid? GetCurrentUserId()
    {
        if (_httpContextAcessor.HttpContext?.User?.Identity?.IsAuthenticated == true)
        {
            var claimValue = _httpContextAcessor?.HttpContext?.User?.FindFirstValue(ClaimTypes.NameIdentifier);
            return claimValue != null && Guid.TryParse(claimValue, out var userId) ? userId : default;
        }

        return default;
    }
}