Gets the players leaderboard entry and stores it in the playerScore
property.
The data is requested in an async call, so the result isn't available immediately.
When the call completes this Leaderboard will emit the getplayerscore
event along with the score and the name of the Leaderboard.
If the player has not yet saved a score, the event will send null
as the score value, and playerScore
will be set to null
as well.
This Leaderboard instance.