title: generate auth0Sub id by email
body: <p>Hi there I am new to the Auth0 thing we are creating an app where we use passwordless auth0 user only has to put an email in our app then the auth0 link will send in the user email when the user clicks it will open out the app also the same time the user is created in our user database with
  auth0Sub id, this case in staging and dev environment but now in a production environment we only allowed few users for login/signup this time client requirement he has the bulk of user JSON file where user email and information store so my team leader said I have to find an Auth0 related script where I can send(pass) our user JSON file and based on user email I will get
  auth0Sub id as a response so that further I can manually store user data with
  auth0Sub id in user collection of production environment however I searched google but was not able to find the correct answer</p>