signIn: function () {
  let ctx = this;

  // backend-auth: use this code if you'd wanna handle the goole auth on your backend
  //Vue.googleAuth().signIn(this.onSignInSuccess, this.onSignInError)

  // frontend-auth: we use this in the example to retrieve the full level of user auth on the frontend
  Vue.googleAuth().directAccess()
  Vue.googleAuth().signIn(function (googleUser) {
    let user = JSON.parse(JSON.stringify(googleUser));
    localStorage.currentUser = JSON.stringify(user.w3);

    ctx.$store.dispatch('login')
    // console.log('redirect to ', ctx.$route.query.redirect)
    ctx.$router.replace(ctx.$route.query.redirect || '/authors')
  }, function (error) {
    console.log(error)
  })
}