The player leaderboard is an array of objects with the following structure:
|The user's wallet address.
|The user's rank in the leaderboard.
|The number of rounds the user has played across.
|topCollections (exists for the global leaderboard)
|An array of all the collections the user has played, sorted in descending order of rounds played.
TopCollection model is the following:
|The slug of the collection.
|The number of collection rounds the
user has played.