blah.js

// async await
const setHighScores = async ({username, numOfWind}) => {
  try {
    const highScoreDoc = await score.doc(userName);
    const response = await highScoreDoc.update({numOfWins: increment});
  } catch (e) {
    console.log(e);
  }
}
// call back "hell"
const setHighScores = ({username, numOfWind}) => {
    score.doc(userName).then(highScoreDoc => {
      highScoreDoc.update({numOfWins: increment})
        .then(response => console.log(response))
        .catch(err => console.log(err);
    }).catch(err => console.log(err);
}