title: I cannot just seem to reference the child under User ID from firebase database
body: <p>I have tried all the ways to reference the child (username) under, UID generated for displaying a string value in text view from Firebase database, but it won't just show up</p>
  
  <p>Database:</p>
  
  <p><a href="https://i.stack.imgur.com/82AcJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/82AcJ.png" alt="enter image description here"></a></p>
  
  <pre><code>DatabaseReference mDatabaseReference = FirebaseDatabase.getInstance().getReference().child("Users").child("uid").child("username");
      mDatabaseReference.addValueEventListener(new ValueEventListener() {
          @Override
          public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
              if (dataSnapshot.exists()) {
                  String username = Objects.requireNonNull(dataSnapshot.getValue()).toString();
                  mName.setText(("username" + username ));
              } else {
                  mName.setText(null);
              }
          }
          @Override
          public void onCancelled(@NonNull DatabaseError databaseError) {
  
          }
      });
  </code></pre>
  
  <p>TextView:</p>
  
  <p><a href="https://i.stack.imgur.com/C4WtW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C4WtW.png" alt="enter image description here"></a></p>
  
  <p>it always goes to the else part, what am I doing wrong?</p>