Happy flow for creating realms works

But needs more validating...

IdentityShroud.Core/Model/Realm.cs

@@ -1,10 +1,45 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using IdentityShroud.Core.Contracts;
+
 namespace IdentityShroud.Core.Model;
 
+[Table("realm")]
 public class Realm
 {
+    private byte[] _privateKeyDecrypted = [];
+    
     public Guid Id { get; set; }
+    /// <summary>
+    /// Note this is part of the url we should encourage users to keep it short but we do not want to limit them too much
+    /// </summary>
+    [MaxLength(40)]
     public string Slug { get; set; } = "";
-    public string Description { get; set; } = "";
-    public List<Client> Clients { get; set; } = [];
-    public byte[] PrivateKey { get; set; } 
+    
+    [MaxLength(128)]
+    public string Name { get; set; } = "";
+    public List<Client> Clients { get; init; } = [];
+
+    public byte[] PrivateKeyEncrypted
+    {
+        get;
+        set
+        {
+            field = value;
+            _privateKeyDecrypted = [];
+        }
+    } = [];
+
+    public byte[] GetPrivateKey(IEncryptionService encryptionService)
+    {
+        if (_privateKeyDecrypted.Length == 0 && PrivateKeyEncrypted.Length > 0)
+            _privateKeyDecrypted = encryptionService.Decrypt(PrivateKeyEncrypted);
+        return _privateKeyDecrypted;
+    }
+
+    public void SetPrivateKey(IEncryptionService encryptionService, byte[] privateKey)
+    {
+        PrivateKeyEncrypted = encryptionService.Encrypt(privateKey);
+        _privateKeyDecrypted = privateKey;
+    }
 }