So, I can’t figure it out on my own and I’m asking for help
Initialisation.
Data sheets: Users - List of users signed to app Items - List must be connected to certain User Friends - Must be an sub-list of users Events - Must be connected to the list of selected Items and selected Friend. Friends can be connected to certain item.
Task: Create data sheets, that will help organize and manage items, friends, and events.
Before making definition like this, it is better to just layout the use case, the story behind it, so people can be familiar with the situation, unless you talk to someone that already know your situation and your terms.
For example, is the event like music concert ? is the item like food in restaurant ? is the friend can access the app too ? and so on.