Thanks for reaching out, implementation was so far quite a breeze for the very first basic steps until a guest login and leaderboard setup.
Maybe a small thing which you could look into: Having a quick way to leave feedback per documentation page would be nice.
Reason is, there is a mistake on Leaderboard Data Retrieval page and I wanted to highlight that in a simple/direct way on that page, but only can leave some good/bad feedback smileys.
Mistake is, that it lists after as an input - which seem to be outdated/not implemented that way in the latest Unity Lootlocker package and leads to a compile error: LootLockerSDKManager.GetScoreList(leaderboardID, count, after, ...)