I need to add my custom field for user selector.
#region Creator
[PXDBString]
[PXUIField(DisplayName = Messages.Creator, Required = true, Enabled = true, Visibility = PXUIVisibility.SelectorVisible)]
[PXSelector(
typeof(Search<Users.username, Where<Users.isHidden, Equal<False>>>)
)]
public virtual string Creator { get; set; }
public abstract class creator : PX.Data.BQL.BqlString.Field<creator> { }
#endregion

I have some problem