I am working on building cross-platform app with Xamarin. I have back-end Web API and all of my tables are configured. My issue is, I want to build a login system that will take user information and show related data. How can I make app to show data to user which group he/she belongs to? Let's say I have a finance group or sale group, user will only see data from his/her group. Is that possible? If it is, could you please give me some idea/example for how to implement this.