title: Manually adding Firebase users with custom claims
body: <p>I am developing an app that only manually added users can access (I add a user manually in the <code>auth</code> tab in the Firebase console with a given Email and Password, and then the user can log in using the mobile app).</p>
  
  <p>I want to add to some users the role of "Manager" while adding then manually. I've heard <code>Custom Claims</code> can be a solution for it, but I couldn't find a way to manually add <code>Custom Claims</code> in the Firebase console.</p>
  
  <p>Is it possible? And if it's not, how can I add a Firebase user role when creating users manually?</p>
  
  <p>Thank you!</p>