googlecloudfunctions
Google Cloud Functions
Updating the Email functions.
Google's guide to deploying to GCF
Be sure to be logged in to firebase when running deployments
$ firebase login
When logging in, it will take you to a browser window where you have to login to the google account connected to your firebase account.
$ npm run deploy
API key
Please remove the API key before committing code, ask for the mailgun api key when deploying, but do not commit it to the repo!