How to create default users

Am evaluating 19.2.6

Which demos have creating DC users in code

This happens when I use remote idatastore

var usersRole2 = ObjectSpace.Xafari().FindObject(new BinaryOperator("Name", "Clerk"));
var usersRole = ObjectSpace.Xafari().FindObject(new BinaryOperator("Name", "Users"));
usersRole2.ChildRoles.Add(usersRole);
IDCSecuritySystemUser user = ObjectSpace.Xafari().FindObject(new BinaryOperator("UserName", "James"));
if (user == null)
{
user = ObjectSpace.Xafari().CreateObject();
user.DCRoles.Add(usersRole);
user.SetPassword("123");
user.UserName = "James";

ObjectSpace.CommitChanges();

}
cant login the second time when using remote idatastore

The wcf application is exposing IDatastore contract ,
updater code

public override void SafeUpdateDatabaseAfterUpdateSchema()
{
base.SafeUpdateDatabaseAfterUpdateSchema();
if (CreateUserData())
{
SeedDatabase();
ObjectSpace.CommitChanges();
}

}

private void SeedDatabase()
{
var defaultAccountClass = ObjectSpace.Xafari().CreateObject();
defaultAccountClass.Name = "Default";

}

bool CreateUserData()
{
var usersRole = ObjectSpace.FindObject(new BinaryOperator("Name", XafariSecuritySystem.UsersRoleName));
var principalsRole = ObjectSpace.FindObject(new BinaryOperator("Name", "Principals"));
IDCSecuritySystemUser user = ObjectSpace.FindObject(new BinaryOperator("UserName", "James"));
if (user == null)
{
principalsRole.ChildRoles.Add(usersRole);
user = ObjectSpace.Xafari().CreateObject();
user.DCRoles.Add(principalsRole);
user.SetPassword("123");
user.UserName = "James";
usersRole.ChildRoles.Add(principalsRole);
return true;
}
return false;
}

server code

public class ImsCachedDataStoreService : CachedDataStoreService
{
public static ICachedDataStore DataStore;

static ImsCachedDataStoreService()
{
var connectionString = MSSqlConnectionProvider.GetConnectionString(".\\sqlexpress", "PImsDb99");
var dataStore = XpoDefault.GetConnectionProvider(connectionString, AutoCreateOption.DatabaseAndSchema);
DataStore = new DataCacheRoot(dataStore);
}
public ImsCachedDataStoreService()

: base(DataStore)
{
}
}

I am exposing IDatastore through wcf so yes it is a wcf service but not xaf server

Am using xafarisecuritysystem with syncsecuritywithmodel=true
And domain components

also which email can I use to request a quotation for a custom module