Nuxt Firebase "@nuxtjs/firebase" plug in alternative for vuex that returns the JWT token and sets in Vuex

FirebaseVuexPlugin.js

// Using the "@nuxtjs/firebase" module
import {mutationNames} from '@/data/StoreNames'

export default async ({ store, app }, inject) => {

    // Sets up a listener, mutations and action for every onAuthStateChanged by Firebase.
    // AND runs the functions once BEFORE the root Vue.js Application is instantiated.
  
    const unsubscribe = await new Promise(resolve => {
      const unsubscribe = app.$fireAuth.onAuthStateChanged(async user => {
        const credential = user ? (await user.getIdTokenResult(true)) : null
        store.commit(mutationNames.ON_AUTH_STATE_CHANGED_MUTATION, { user, credential })
     
        resolve(unsubscribe)
      })
    })
  
    inject('fireAuthUnsubscribe', unsubscribe)
}