const { IDVClient, AuthTokenGenerator } = require('yoti');

// Generate an access token
const generator = new AuthTokenGenerator(sdkId, pemString);
const tokenResponse = await generator.generate(['idv:sessions']);

// Create IDV client with token auth
const idvClient = new IDVClient(null, null, { authToken: tokenResponse.getAccessToken() });

// Use as usual
const session = await idvClient.createSession(sessionSpec);

const idvClient = new IDVClient(sdkId, pemString);