Use @auth0/auth0-spa-js for custom embedded authentication experience

[konrad.sopala]

After a few minutes of digging seems like I found the answer:

Auth0-spa-js additionalSignUpFields

Hi @nfnlabs, When you use auth0-spa-js from your app, the Auth0 SPA SDK handles grant and protocol details, token expiration and renewal, as well as token storage and caching. Under the hood, it implements Universal Login and the Authorization Code Grant Flow with PKCE. (for more on which fields you can control from auth0-spa-js , please refer to @auth0/auth0-spa-js) To add additional signup field you have to go to auth0 dashboard > Universal Login > Loing tab In the code below use using the…