Flutter oAuth : how to get started with OAuth and Stripe connect

Question

I am trying to implement stripe connect in my flutter app. Here are the steps I need to implement. Can anyone please navigate me on how I could achieve this in Flutter?

Answer 1

The answer selected is not completely correct: If you dont assign the account_id to a user then it's of no use. The only way to pass the user_id (fUser.uid) is to pass it using the state parameter.

exports.StripePI = functions.https.onRequest(async (req, res) => {
//    console.log('accountIdq ' + req.query.error);
//    console.log('accountIdq ' + req.query.state);
//    return;
//        if(!req.query.code)
//            return res.send("An Error has occured please try again");
    const response = await stripe.oauth.token({
      grant_type: 'authorization_code',
      code: req.query.code,
    }).then(async response => {
            var connected_account_id = response.stripe_user_id;
          await admin.firestore().collection('Registration').doc(req.query.state)
                           .update({customer_id : connected_account_id});
           return res.send("Well done, account integration is completed. You can now close the window and go back to the app");
        });
});