public EnterUsernamePageViewModel(ISaveUserSecurityService saveUserSecurityService, ISetUsernameService setUsernameService, IClearUserSecurityService clearUserSecurityService, IDialogService dialogService, IKillApplication killApp) : base(clearUserSecurityService, dialogService) { SaveUserSecurityService = saveUserSecurityService; SetUsernameService = setUsernameService; KillApplication = killApp; }