firebase.js plugin for the medium post about configuring google-sign in with vue, nuxt, firebase

firebase.js

import firebase from 'firebase'

// copy the config from the console https://console.firebase.google.com/u/0/project/sign-11111/settings/general/
var firebaseConfig = {
  apiKey: "AI1111111111111111111111111111",
  authDomain: "sign-1111111.firebaseapp.com",
  databaseURL: "https://sign-11111.firebaseio.com",
  projectId: "sign-11111",
  storageBucket: "sign-11111.appspot.com",
  messagingSenderId: "111111111111",
  appId: "1:1111111:web:111111111111111"
};
let app = null
// prevent initializing firebase more than once
if (!firebase.apps.length) { 
  app = firebase.initializeApp(firebaseConfig)
}
// inject it so it can be accessed as this.$firebase inside the project
export default (ctx, inject) => {
  inject('firebase', firebase)
}