What information can be obtained through the social media API?

Question

Facebook

Question:
1. What data can be obtained about the user of the mobile application if he logged in through the social network button? Namely (I fantasize): gender, age, marital status (married, searching, in love), children (their gender and age), movements around the world, interests, favorite brands ... what else?
2. Where can I get detailed information on this issue?
Thank you!

Answer 1

Where can I get detailed information on this issue?

Each social network has documentation, everything is described there:
https://vk.com/dev
https://developers.facebook.com
https://apiok.ru
The ones he agrees to. You create a request for any data, the user receives a dialog box with a request for them, and agrees or not. The list of data that can be obtained for each network is different, see the documentation.