Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download CommUnity Free.
CommUnity gives you the ability to add a social layer to your game in record time.
– User system with login, registration and email confirmation.
– User profiles: name, status, avatar…
– News: keep your users informed
– Friends lists
– Messaging system
– Scoreboards, achievements…
– Cloud files: save your players saved data in your server
– And much more!
A VPS/Dedicated Server/Web server capable of running PHP5+ and MySQL5+