Ionic cloud auth, for web app

I use ionic auth for my mobile app, and want to have a web app, with the same user base. Can I use ionic cloud auth without Cordova?

I have tried making a web port if an ionic app, less than ideal, but the browser blocks in frame CORS.

I have tried implementing the oauth2 myself, and injecting the token into, with no success.

I think if I can’t get around this I will need to switch my webapp and my mobile apps to something like google firebase.

Just feels like I should be able to disable the in app browser and transition through oauth2 in the riot page.