Add get, getAll and setUserState methods
Add get, getAll and setUserState methods


Former-commit-id: 7fcd187bf94918d7b76832446a3c90a552acddde
Former-commit-id: 8d6243bce74d22eddb27816975e511465b8ceade
Former-commit-id: 1aa3aa9bf7f0803058e9a216c4fbd22bc48da364
ONSdigital/florence,ONSdigital/florence,ONSdigital/florence,ONSdigital/florence