Update only 1 item inside firebase no.

I have the following node in the firebase:

InsidedesnóIneedtoaccesstheuservalueandchangeit,todothisIamusingthiscode:

firebaseSenha=ConfiguracaoFirebase.getFirebase().child("usuarios").child(identificadorUsuarioLogado);

                firebaseSenha.addListenerForSingleValueEvent(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        Usuario usuarioSenha = dataSnapshot.getValue(Usuario.class);

                        String senhaRecuperada = senha.getText().toString();

                        firebaseSenha = ConfiguracaoFirebase.getFirebase();
                        firebaseSenha = firebaseSenha.child("usuarios").child(identificadorUsuarioLogado);

                        Usuario usuario = new Usuario();

                        usuario.setSenha(senhaRecuperada);

                        firebaseSenha.setValue(usuario);
                    }

                    @Override
                    public void onCancelled(DatabaseError databaseError) {

                    }
                });

But these code is causing all the other fields inside the node to go out and about only the changed password value, how do I change only the password value, without deleting the others.

After running the code it looks like this: