<script src="https://cdn.auth0.com/js/lock/11.14/lock.min.js"></script>
<script>
var lock = new Auth0Lock('YOUR_CLIENT_ID', 'YOUR_DOMAIN');


function signin() {
  lock.show({
      callbackURL: 'http://localhost:CHANGE-TO-YOUR-PORT/signin-auth0'
    , responseType: 'code'
    , authParams: {
      scope: 'openid name email' //Details: https:///scopes
    }
  });
}
</script>

<button onclick="signin()">Login</button>