How can get all user list through plugin

Hi i am using below code to get user list 

Apis.Get<Telligent.Evolution.Extensibility.Api.Version1.Users>().List(new UsersListOptions() {  }); it is only returning 20 records how ca i get full record or can appply filter for ExtendedAttributes

but it is only returning 20 records i want either all users or can apply filter by extendedattributes into alll user list