You need to implement a basic functionality, that updates the firebase firestore using the user auth uid as docName, and it must have the following fields, isAdult (boolean), selectedGenres (Array of strings), likedItems (Array of strings).
Also you need to implement a way of fetching the data from firestore and storing them locally, only update it when the user updates something.
set and get user choices from Firestore
keypoints
isAdult
(boolean),selectedGenres
(Array of strings),likedItems
(Array of strings).