diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentitySecurityLog.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentitySecurityLog.cs
index b720f667f0..b8efbc117f 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentitySecurityLog.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentitySecurityLog.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using Volo.Abp.Domain.Entities;
 using Volo.Abp.Guids;
 using Volo.Abp.MultiTenancy;
@@ -35,12 +34,12 @@ namespace Volo.Abp.Identity
 
         protected IdentitySecurityLog()
         {
-            ExtraProperties = new Dictionary<string, object>();
+
         }
 
         public IdentitySecurityLog(IGuidGenerator guidGenerator, SecurityLogInfo securityLogInfo)
+            : base(guidGenerator.Create())
         {
-            Id = guidGenerator.Create();
             TenantId = securityLogInfo.TenantId;
             TenantName = securityLogInfo.TenantName.Truncate(IdentitySecurityLogConsts.MaxTenantNameLength);
 
@@ -57,8 +56,6 @@ namespace Volo.Abp.Identity
             ClientId = securityLogInfo.ClientId.Truncate(IdentitySecurityLogConsts.MaxClientIdLength);
             CorrelationId = securityLogInfo.CorrelationId.Truncate(IdentitySecurityLogConsts.MaxCorrelationIdLength);
             BrowserInfo = securityLogInfo.BrowserInfo.Truncate(IdentitySecurityLogConsts.MaxBrowserInfoLength);
-
-            ExtraProperties = securityLogInfo.ExtraProperties;
         }
     }
 }
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
index 287328573d..f48553681c 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
@@ -143,11 +143,11 @@ namespace Volo.Abp.Identity
             [NotNull] string userName,
             [NotNull] string email,
             Guid? tenantId = null)
+            : base(id)
         {
             Check.NotNull(userName, nameof(userName));
             Check.NotNull(email, nameof(email));
 
-            Id = id;
             TenantId = tenantId;
             UserName = userName;
             NormalizedUserName = userName.ToUpperInvariant();
@@ -161,8 +161,6 @@ namespace Volo.Abp.Identity
             Logins = new Collection<IdentityUserLogin>();
             Tokens = new Collection<IdentityUserToken>();
             OrganizationUnits = new Collection<IdentityUserOrganizationUnit>();
-
-            ExtraProperties = new Dictionary<string, object>();
         }
 
         public virtual void AddRole(Guid roleId)
diff --git a/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameModuleExtensionConfigurator.cs b/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameModuleExtensionConfigurator.cs
index 61795eb4e5..e5c20d26e0 100644
--- a/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameModuleExtensionConfigurator.cs
+++ b/templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameModuleExtensionConfigurator.cs
@@ -37,6 +37,25 @@ namespace MyCompanyName.MyProjectName
 
         private static void ConfigureExtraProperties()
         {
+            ObjectExtensionManager.Instance.Modules()
+                .ConfigureIdentity(identity =>
+                {
+                    identity.ConfigureUser(user =>
+                    {
+                        user.AddOrUpdateProperty<string>( //property type: string
+                            "SocialSecurityNumber", //property name
+                            property =>
+                            {
+                                //validation rules
+                                property.Attributes.Add(new RequiredAttribute());
+                                property.Attributes.Add(new StringLengthAttribute(64) {MinimumLength = 4});
+
+                                //...other configurations for this property
+                            }
+                        );
+                    });
+                });
+
             /* You can configure extra properties for the
              * entities defined in the modules used by your application.
              *