Cant obtain the data from firebase realtime database, to my recycler view

Question

I am developing an app the will utilize the data from a real-time database from firebase, and i want to present that data on a recyclerView.

I created a recyclerView with an adapter and all that's necessary for one to work, but im not being able to get the data from the database.

The code i currently have on my adapter is:

public class Adapter extends RecyclerView.Adapter<Adapter.MyViewHolder>{

    Context context;

    ArrayList<User> list;

    public Adapter(Context context, ArrayList<User> list) {
        this.context = context;
        this.list = list;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(context).inflate(R.layout.item,parent, false);
        return new MyViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {

        User user = list.get(position);

        holder.nome.setText(user.getNome());
        holder.local.setText(user.getLocal());
        holder.preco.setText(user.getPreco());

    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    public static class MyViewHolder extends RecyclerView.ViewHolder{

        TextView nome, local, preco;

        public MyViewHolder(@NonNull View itemview){
            super(itemview);

            nome = itemview.findViewById(R.id.textView1);
            local = itemview.findViewById(R.id.textView2);
            preco = itemview.findViewById(R.id.textView3);

        }
    }
}

And this the code i have on the List

public class Userlist extends AppCompatActivity {

    RecyclerView recyclerView;
    DatabaseReference database;
    Adapter adapter;
    ArrayList<User> list;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_userlist);

        recyclerView = findViewById(R.id.userlist);
        //database = FirebaseDatabase.getInstance();
        database = FirebaseDatabase.getInstance().getReference("Esp");
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        list = new ArrayList<>();
        adapter = new Adapter(this,list);
        recyclerView.setAdapter(adapter);

        final Context context = this;
        database.addValueEventListener(new ValueEventListener() {

            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                if (snapshot.exists()){
                    Toast.makeText(context, "Dados recebidos da Firebase!", Toast.LENGTH_LONG).show();
                }else {
                    Toast.makeText(context, "Nao ha dados recebidos!", Toast.LENGTH_SHORT).show();
                }

                for (DataSnapshot dataSnapshot : snapshot.getChildren()){

                    User user = dataSnapshot.getValue(User.class);
                    list.add(user);


                }
                adapter.notifyDataSetChanged();

            }


            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) { throw databaseError.toException(); }
        });


    }
}

I tried to change variables, change the path to the database, and still no success. I have checked the permissions on firebase and both read and write are set to true.

This is how i have my data on the realtime database

{
  "Esp": {
    "andre": {
      "local": "Porto",
      "nome": "Andre",
      "preco": "23"
    },
    "andre2": {
      "local": "Gandra",
      "nome": "Andre2",
      "preco": "23"
    }
  }
}

My user class

public class User {

    String nome, local, preco;

    public String getNome() {
        return nome;
    }

    public String getLocal() {
        return local;
    }

    public String getPreco() {
        return preco;
    }
}