Google oauth2 get access token

[Robilol]

Hi !

I want to get the google access token cause I need to send it to my API for authentification. But I don't manage to get it.

How can I do ? is it possible to get directly the access token instead of the authorization code ?

I've tried to exchange the autorization code for an acces token with google oauth API but I got an error :

{ error: 'invalid_grant', error_description: 'Missing code verifier.' }

const url =
        'https://oauth2.googleapis.com/token?' +
        new URLSearchParams({
          client_id: process.env.GOOGLE_ID || '',
          client_secret: process.env.GOOGLE_SECRET || '',
          grant_type: 'authorization_code',
          code: query.code,
        })

      const response = await fetch(url, {
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
        },
        method: 'POST',
      })

      const  accessToken = await response.json()

Any help is welcome, thanks ! 🙏

[balazsorban44]

could you share what you are trying to achieve? after logging in, your access token is available on the account object in the jwt callback. None of the above is necessary.

https://next-auth.js.org/configuration/callbacks#jwt-callback

[Robilol]

Effectively, it was in the account object of the JWT callback 😅
Thanks !

[sudhanshubsr]

[next-auth][error][OAUTH_CALLBACK_ERROR]
https://next-auth.js.org/errors#oauth_callback_error invalid_grant (Bad Request) {
error: OPError: invalid_grant (Bad Request)
at processResponse (webpack-internal:///(rsc)/./node_modules/openid-client/lib/helpers/process_response.js:34:19)
at Client.grant (webpack-internal:///(rsc)/./node_modules/openid-client/lib/client.js:1206:28)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Client.callback (webpack-internal:///(rsc)/./node_modules/openid-client/lib/client.js:418:30)
at async oAuthCallback (webpack-internal:///(rsc)/./node_modules/next-auth/core/lib/oauth/callback.js:118:22)
at async Object.callback (webpack-internal:///(rsc)/./node_modules/next-auth/core/routes/callback.js:18:79)
at async AuthHandler (webpack-internal:///(rsc)/./node_modules/next-auth/core/index.js:202:38)
at async NextAuthRouteHandler (webpack-internal:///(rsc)/./node_modules/next-auth/next/index.js:50:30)
at async NextAuth._args$ (webpack-internal:///(rsc)/./node_modules/next-auth/next/index.js:85:24)
at async C:\Users\sudha\OneDrive\Desktop\Portfolio\PortFolio Projects\feedback-board\node_modules\next\dist\compiled\next-server\app-route.runtime.dev.js:6:63251 {
name: 'OAuthCallbackError',
code: undefined
},
providerId: 'google',
message: 'invalid_grant (Bad Request)'
}

could you please help me with this not able to resolve it