title: How to update an user as admin in Firebase
body: <p>I've a web application and I want, as the <em>Admin user</em>, to be able to update the information like <code>displayName</code> and <code>photoURL</code> of other users with <code>Firebase</code> authentication. </p>
  
  <p>Typically if we want to update the user information we use <code>firebase.User.updateProfile()</code> <em>but that just works for the current user</em>, and, as I've mentioned before, I'm logged in with an admin account and I want to update other users' profiles.</p>
  
  <p>My question is: Is there a function to which you can pass the <code>uid</code> and the information of an user to be updated?</p>
  
  <p>Thanks.</p>