AudiencesStore - create a ClientId(AudienceId) and Base64Secret(AudienceSecret) for JWT tokens

AudiencesStore.cs

namespace WebApi.Identity.Providers
{
    using System;
    using System.Collections.Concurrent;
    using System.Security.Cryptography;
    using Microsoft.IdentityModel.Tokens;

    public static class AudiencesStore
    {
        public static ConcurrentDictionary<string, Audience> AudiencesList = new ConcurrentDictionary<string, Audience>();

        static AudiencesStore()
        {
            AudiencesList.TryAdd("6182376b3db44c399c77d5dfbd58df79", // GUID
                new Audience
                {
                    ClientId = "6182376b3db44c399c77d5dfbd58df79", // GUID
                    Base64Secret = "A1z9SxIfUM32I6YY_jbbe2m7S2eNMPVVxmUhRzmSC5I",
                    Name = "My.WebApi.Api 1"
                });
        }

        public static Audience AddAudience(string name)
        {
            var clientId = Guid.NewGuid().ToString("N");

            var key = new byte[32];
            RNGCryptoServiceProvider.Create().GetBytes(key);
            var base64Secret = Microsoft.IdentityModel.Tokens.Base64UrlEncoder.Encode(key);

            Audience newAudience = new Audience { ClientId = clientId, Base64Secret = base64Secret, Name = name };
            AudiencesList.TryAdd(clientId, newAudience);
            return newAudience;
        }

        public static Audience FindAudience(string clientId)
        {
            Audience audience = null;
            if (AudiencesList.TryGetValue(clientId, out audience))
            {
                return audience;
            }
            return null;
        }
    }

    public class Audience
    {
        public string ClientId { get; set; }
        public string Base64Secret { get; set; }
        public string Name { get; set; }


        public override string ToString()
        {
            return $"Name:{this.Name}, Base64Secret: {this.Base64Secret}, ClientId: {this.ClientId}";
        }
    }
}

Program.cs

class Program
{
    static void Main(string[] args)
    {
        var webApi = AudiencesStore.AddAudience("My.WebApi API");
        var mobileApp = AudiencesStore.AddAudience("My.WebApi Mobile App");

        Console.WriteLine(webApi);
        Console.WriteLine(mobileApp);

        Console.ReadLine();
    }
}