title: Firebase authentication - Display user info
body: <p>I use the firebase realtime database to store user information.</p>
  
  <p>Here is a picture of the database:
  <a href="https://i.stack.imgur.com/grH8s.jpg" rel="nofollow noreferrer">screenshot of the database</a></p>
  
  <p>For example, how can I get the value "nombre_dons" according to the connected user to display it in the application ? I use android studio in java.</p>
  
  <p>Thank you in advance for your help</p>