What is the best authorization library?

Question

Android

I want to add user authorization to my application through Google, VK, Twitter, etc. I would like to store some data for each authorized user and allow him to share his achievements in the application.
I want to consider the best options for libraries and what they can do. Data storage will probably be on my server, but for this, each user must be given a unique key. how to do it? Does the authorization library allow you to get some unique id for each authorized service? (Auth token won't work because it can expire) I wonder if there are free services that allow you to store key-value pairs?
Sorry for Russian.