Authentication over RestAPI support

[GokulDas027]

Goals

1. Exposing Rest API for authentication in native android/ios apps that uses nextjs as backend

Non-Goals

1. Doesn't have to handle android/ios app side of things

Background

I'm using authjs for authentication in a nextjs project, and now building android/ios (KMM) app for the same using APIs from nextjs.
Google authentication is setup at the client side, which provides the google access token, which needs to verified from backend (nextjs) and collect user info from google. Currently, couldn't find an endpoint provided by authjs for doing it, neither does a method to do the same on passing the token from frontend.

Now i'm having to implement a parallel authentication/authorization pipeline for api requests from apps

Proposal

A RestAPI endpoint to POST the access token/credentials from client side, and handle the server side actions for authentications as it's done for next frontend and then respond with user details and jwt token for the app.