// And then how you get the leaderboard data, for example

// First, you import the Firebase.js file
import firebase from '../Firebase';

// Then get a reference to the database you want, in this case, "leaderboard"
const leaderboardRef = firebase.database().ref('leaderboard');

// Then from the reference, get snapshots of the data and save them to an array or something.
leaderboardRef.on('value', (snapshot) => {
     let leaders = snapshot.val();
     let newState = [];

     for( let leader in leaders ) {
            newState.push({
                    key: leader,
                    player: leaders[leader]["PLAYER"],
                    points: leaders[leader]["POINTS"],
                    round_of_16: leaders[leader]["ROUND OF 16"],
                    quarter_finals: leaders[leader]["QUARTER FINALS"],
                    semi_finals: leaders[leader]["SEMI FINALS"],
                    finals: leaders[leader]["FINALS"],
                    totals: leaders[leader]["TOTALS"]
            });
      }
      this.setState({
           leaderboard: newState
      });
});