delete_user.js

const admin = require('firebase-admin');

// Usage: node delete_user.js <email>

const app = admin.initializeApp();

const email = process.argv[2];
admin.auth().getUserByEmail(email)
  .then((user) => {
    return admin.auth().deleteUser(user.uid);
  })
  .then(() => {
    return app.delete();
  });