How to store more information using FormsAuthentication?

What are recommended ways to use/store Facebook friends Information available using Facebook login?

• I am planning to develop a mobile app where I am planning to use Facebook login and facebook friends. How is it recommended to use the information of friends. Should I store the ID of friends in the local database for of app or should it be accessed using facebook API every time user is trying to use data of friends. AND For example if I want to create groups with some specific friends of the users in each group, what is technically recommended way of doing that ? Are there any online blogs/examples/samples available ?

• Answer:

  You want to store data locally or fetch every time depends on in what context your app is using the data. If response time is more important than the up-to-date friends' list, you should store it locally and refresh it whenever user logs back in (or any other time as per the workflow). You should fetch the current list every time from Facebook if accuracy of the list is very important in the workflow and you have way to make users wait until the list is fetched.