Mixing Async/Await & Promises

async_await_promises_ohmy.js

var saveDoc = async function(data) {
  const saveData = {
    ...data,
    ...{ savedTimestamp: admin.firestore.FieldValue.serverTimestamp() }
  }

  db.collection('Auth').doc(data.team_id).set(saveData).then(res => {
    console.log('Auth data updated for:', data.team_id);
  });
}

module.exports.install = (app, slack) => {
  app.route('/oauth')
    .get((request, response) => {
      console.log('Request for /oauth');
      const payload = request.query;

      if (!payload.code) {
        return response.redirect(302, installUrl);
      }

      return slack.oauth.v2
        .access({
          client_id: process.env.SLACK_CLIENT_ID,
          client_secret: process.env.SLACK_CLIENT_SECRET,
          code: payload.code,
          state: payload.state
        })
        .then(data => {
        // ...