title: firebase PHP: create user
body: <p>I have data that I need to save into firebase from a user.  My Firebase schema is like..</p>
  
  <pre><code>{
     users: {
        1: {
           data..
  </code></pre>
  
  <p>Is it possible to create a new Firebase user in PHP so that I can use the generated user_id to save the data?</p>