Happy flow for creating realms works

But needs more validating...

IdentityShroud.Core/Security/ConfigurationSecretProvider.cs

@@ -0,0 +1,17 @@
+using IdentityShroud.Core.Contracts;
+using Microsoft.Extensions.Configuration;
+
+namespace IdentityShroud.Core.Security;
+
+/// <summary>
+/// Secret provider that retrieves secrets from configuration.
+/// </summary>
+public class ConfigurationSecretProvider(IConfiguration configuration) : ISecretProvider
+{
+    private readonly IConfigurationSection secrets = configuration.GetSection("secrets"); 
+    
+    public string GetSecretAsync(string name)
+    {
+        return secrets.GetValue<string>(name) ?? "";
+    }
+}

IdentityShroud.Core/Security/RsaHelper.cs

@@ -0,0 +1,7 @@
+using System.Security.Cryptography;
+
+namespace IdentityShroud.Core.Security;
+
+public static class RsaHelper
+{
+}