title: issue on: Unhandled Exception: [firebase storage/unauthenticated] User is unauthenticated. Authenticate and try again
body: <p>I have to upload pictures to the firebase storage. I tried to remedy the problem with 2 different methods to no avail.</p>
  <p>The first one: it says that I am unauthenticated like in the title of the topic. So I looked on the internet and I found the following <a href="https://medium.com/firebase-developers/firebase-app-check-a-new-dimension-in-app-security-96c807978ae" rel="nofollow noreferrer">link</a>.</p>
  <p>The fact is that there is no tutorials on the App Check. I don't know if I have to use it or if I can do something else.</p>
  <p>On some <a href="https://firebase.google.com/docs/app-check/android/safetynet-provider?authuser=0#kotlin%20ktx_1" rel="nofollow noreferrer">topics</a> they recommend to implement some lines of code but I don't know in what file.</p>
  <p>thank you for your help</p>
  <p><a href="https://i.stack.imgur.com/4Y1bU.png" rel="nofollow noreferrer">here are the firebase rule</a></p>