Leaderboard: hit the API

[massazoum]

Hi team ,

• I created a new game with the name of your choice by using the API.
• ID saved of my game that will be returned by API.
• The "Refresh" button is implemented that will get all scores for a game created by you from the API (receiving data from the API and parsing the JSON).
• The form "Submit" button is Implemented that will save a score for a game created by you (sending data to the API).
• I used arrow functions instead of the function keyword.
• I used async and await JavaScript features to consume the API.