Im trying to index certain parts of members using Lucene. I have been successful in indexing custom fields like "country" and "zipcode". But when it comes to the member groups associated with a member im struggling to understand how to do it. Here is the code i have at the moment, if someone coudl push me in the right direction I would appreciate it:

using Examine;
using Examine.Lucene;
using Microsoft.Extensions.Options;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Composing;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Infrastructure.Examine;
using Umbraco.Cms.Infrastructure.Examine.DependencyInjection;

namespace Umbraco.Docs.Samples.Web.CustomIndexing
{
  public class ConfigureMemberIndexOptions : IConfigureNamedOptions<LuceneDirectoryIndexOptions>
  {

    private readonly IUmbracoIndexConfig _umbracoIndexConfig;
    private readonly IOptions<IndexCreatorSettings> _settings;

    public ConfigureMemberIndexOptions(
        IUmbracoIndexConfig umbracoIndexConfig,
        IOptions<IndexCreatorSettings> settings)
    {
      _umbracoIndexConfig = umbracoIndexConfig;
      _settings = settings;
    }

    public void Configure(string name, LuceneDirectoryIndexOptions options)
    {
      if (name.Equals(Constants.UmbracoIndexes.MembersIndexName))
      {
        options.Validator = new MemberValueSetValidator(null, null, new[] {
            "__Key", "NodeName", "gendergroup",
             "__NodeTypeAlias", "__NodeId", "id", "groups" ,
             "stagename", "birthdate", "firstName", "lastName",
             "phone", "email", "address", "zipcode", "city", "country",
             "language", "specialFeatures", "about", "mission"
             }, null);
      }
    }

    public void Configure(LuceneDirectoryIndexOptions options) => Configure(string.Empty, options);
    public class SearchComposer : IComposer
    {
      public void Compose(IUmbracoBuilder builder)
      {
        builder.Services.ConfigureOptions<ConfigureMemberIndexOptions>();
      }
    }
  }