Download the Skillz Unity Sync SDK here.
Install the Unity SDK following the integration steps here.
If you are on Skillz SDK 17.0.x or lower, you may need to update your codebase. Skillz SDKs 18.0.x and above support cross platform integration which means you will only need one codebase in order to release to both iOS and Android. Check out steps 3-8 of this article to learn about the new function calls you should make.
In v18.x, you added your integration to SkillzDelegate.cs directly. In this new version (19.x and higher), SkillzDelegate.cs is now an internal Skillz only file. DO NOT MODIFY THIS UPDATED FILE. Instead, you should save your integration from SkillzDelegate.cs, and you will re-add this later as part of creating a class which implements the SkillzSyncDelegate interface.