title: It is possible to reconnect a user if we use signInAnonimously?
body: <p>I use Firebase Auth, and I use the <code>signInAnonimously()</code> method.</p>
  
  <p>I was wondering if the user delete the app and want to reconnect to with the same account how can I do this ?</p>
  
  <p>I will ask to the user the uid of this last account.</p>
  
  <p>here the method I use to <code>signInAnonymously()</code> :</p>
  
  <pre><code>FirebaseAuth.getInstance().signInAnonymously()
                      .addOnCompleteListener(new OnCompleteListener&lt;AuthResult&gt;() {
                          @Override
                          public void onComplete(@NonNull Task&lt;AuthResult&gt; task) {
                              if(task.isSuccessful()){
                                  Log.i("TAG","tsk :"+task);
                                  uid=FirebaseAuth.getInstance().getCurrentUser().getUid();
                                  Log.i("TAG","uid :"+uid);
                                  createUserInFirestore();
                              }
                              else{
                                  Log.i("TAG","fail "+task.getException());
                              }
  
                          }
                      });
  </code></pre>
  
  <p>If I get the last uid can I reconnect the user ?
  thanks</p>