Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Easy Leaderboard (Facebook + PlayFab) Free.
Easy Leaderboard (Facebook & PlayFab) v2.0.1
The purpose of Easy Leaderboard is to simplify the implementation of leaderboards in your game, utilizing two services that are much used by developers: Facebook and PlayFab.
Documentation | FAQ
Why using Easy Leaderboard?
• Quick implementation: create a worldwide leaderboard in your game in a matter of minutes;
• Picture: shows the profile picture of the players;
• Pagination/incremental search: optimized logic for retrieving PlayFab records in an incremental way;
• Flexible search: you define how many records are supposed to be retrieved on each increment;
• Unlimited statistics: handle as many PlayFab statistics as needed;
• UI-independent: the script has no dependency on UI components, which gives you extra flexibility and ease to adapt it to your game;
• Earn more players: spread your game with Facebook Share!