openlogin flow without redirect

import { Web3AuthCore } from "@web3auth/core"
import Torus from "@toruslabs/torus.js";
import { subkey } from "@toruslabs/openlogin-subkey";

import NodeDetailManager, { ETHEREUM_NETWORK } from "@toruslabs/fetch-node-details";

// Web3Auth clientId
const clientId =
  "BKjpD5DNAFDbX9Ty9RSBAXdQP8YDY1rldKqKCgbxxa8JZODZ8zxVRzlT74qRIHsor5aIwZ55dQVlcmrwJu37PI8"; // get from https://dashboard.web3auth.io

const TORUS_NETWORK = {
  TESTNET: "testnet",
  MAINNET: "mainnet",
  CYAN: "cyan",
} 

export const CONTRACT_MAP = {
  [TORUS_NETWORK.MAINNET]: NodeDetailManager.PROXY_ADDRESS_MAINNET,
  [TORUS_NETWORK.TESTNET]: NodeDetailManager.PROXY_ADDRESS_ROPSTEN,
  [TORUS_NETWORK.CYAN]: NodeDetailManager.PROXY_ADDRESS_POLYGON,
};

export const NETWORK_MAP = {
  [TORUS_NETWORK.MAINNET]: ETHEREUM_NETWORK.MAINNET,
  [TORUS_NETWORK.TESTNET]: ETHEREUM_NETWORK.ROPSTEN,
  [TORUS_NETWORK.CYAN]: ETHEREUM_NETWORK.POLYGON,
};


const ethNetwork = NETWORK_MAP[TORUS_NETWORK.TESTNET];

const torus = new Torus({
  enableOneKey: true,
  network: TORUS_NETWORK.TESTNET,
});

const nodeDetailManager = new NodeDetailManager({ network: ethNetwork, proxyAddress: CONTRACT_MAP[TORUS_NETWORK.TESTNET] });


async function login(verifier, verifierId, idToken) {
  const { torusNodeEndpoints, torusNodePub, torusIndexes } = await nodeDetailManager.getNodeDetails({ verifier, verifierId });
  const userDetails = await torus.getUserTypeAndAddress(torusNodeEndpoints, torusNodePub,  { verifier, verifierId }, true);
  
  // new user and hasn't enabled mfa
 if (userDetails.typeOfUser === "v2" && !userDetails.upgraded) {
    const keyDetails =  await torus.retrieveShares(torusNodeEndpoints, torusIndexes, verifier, { verifier_id: verifierId }, idToken, {});
    const finalPrivKey = subkey(keyDetails.privKey.padStart(64, "0"), Buffer.from(clientId, "base64"));
    // final priv key of user, in example use this key to generate a provider from @web3auth/ethereum-provider package
    return finalPrivKey
  } else {
    // do the web3auth login here using web3auth core by passing idToken
  }
}