How to open login/signup on the Universal login (hosted page)?

So the correct answer is my question. :slight_smile:

On FrontEnd

this.auth0.authorize({
  mode: 'signUp'
});

In the configuration of the hosted page

var lock = new Auth0Lock(config.clientID, config.auth0Domain, {
  (...)
  initialScreen: config.extraParams.mode,
  (...)
});