None of this is required. It only exists so the app can tell you when a recipe needs something you have not got.
Only worth filling in for people who differ from the house. One vegetarian at a table of four, or somebody who will not touch olives.
Anyone who opens this link sees the same week and the same shopping list. Send it to the people you cook with, and keep it somewhere safe: it is also how you get back in on a new phone.
https://localhost/join/93870cf373114169a212f22a43636bae8c008d30aeca408c9793f13b7618e843
Treat it like a key. Anyone with it can read and change your plan, so do not put it anywhere public.