How to redirect from vue3 to grant/express through axios?
I am using vue3 as my front-end. If, therefore, my oauth2 callback goes directly to express.js/grant, my front-end doesn't know about it and cannot act upon the authentication result. Therefore my oauth2 callback with the `?access_token=... ` has to land on the vue3 front end and then be somehow routed/redirected to Express.js through some axios call. Express.js/grant will then complete the authentication by exchanging the code for a token and user/profile and return it to the front end through the axios response.
When I do that, I get:
`GET | http://localhost:5000/?error=Grant: missing session or misconfigured provider`
I am guessing that some "session" information that was created when I made the original request to the grant/express backend is now missing from the axios/vue3 call.
Any ideas on how to resolve this? 