get
Fetches the hiscores for a given player from the RuneScape Hiscores API.
This method makes an HTTP request to the RuneScape Hiscores API and parses the response into a map of Skill to HighscoreEntry, where each entry represents the player's rank, level, and experience in a specific skill.
Return
A map of Skill to HighscoreEntry, or null if the fetch or parsing fails.
Parameters
player
The name of the player whose hiscores are to be fetched.