L'application Android n'écrira pas dans la base de données Firebase Realtime

J'utilise Firebase et Android Studio pour créer une application. J'ai un écran d'enregistrement qui demande à l'utilisateur des informations telles que le nom d'utilisateur et l'emplacement, etc. Lorsque vous cliquez sur le bouton d'enregistrement, l'adresse e-mail et le mot de passe des utilisateurs fonctionnent et s'affichent dans l'onglet d'authentification de la console Firebase. Cependant, je ne peux pas obtenir les détails des utilisateurs tels que le nom d'utilisateur et l'emplacement, à stocker dans la base de données Firebase Realtime.

package com.example.securityapp;

public class Users {

     String username;
     String job;
     String email;
     String office;

     public Users()
    {

    }

    public Users(String username, String job, String email, String office)
    {
        this.username = username;
        this.job = job;
        this.email = email;
        this.office = office;
    }

    public String getUsername()
    {
        return username;
    }

    public String getJob() { return job; }

    public String getEmail()
    {
        return email;
    }

    public String getOffice()
    {
        return office;
    }



}

Users.java

package com.example.securityapp;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

public class register extends AppCompatActivity {

    private FirebaseAuth mAuth;
    EditText emailReg, passwordReg, password2, roleReg, officeReg;
    Button regButton;
    DatabaseReference databaseUsers;
    EditText usernameReg;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        emailReg = (EditText) findViewById(R.id.regEmail);
        usernameReg = (EditText) findViewById(R.id.regUsername);
        passwordReg = (EditText) findViewById(R.id.regPassword);
        regButton = (Button) findViewById(R.id.register_Button);
        password2 = (EditText) findViewById(R.id.confirm_password);
        roleReg = (EditText) findViewById(R.id.regRole);
        officeReg = (EditText) findViewById(R.id.regOffice);
        databaseUsers = FirebaseDatabase.getInstance().getReference();
        mAuth = FirebaseAuth.getInstance();
    }

    public void registerUser() {
        final String email = emailReg.getText().toString();
        final String password = passwordReg.getText().toString();
        String pass2 = password2.getText().toString();
        if(!pass2.equals(password))
        {
            Toast.makeText(register.this, "Passwords Do Not Match",
                    Toast.LENGTH_SHORT).show();
                    return;
        }
        //Code taken from https://firebase.google.com/docs/auth/android/start on 10/11/2019
        mAuth.createUserWithEmailAndPassword(email, password)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information

                            Intent intent_signup = new Intent(register.this, home.class);
                            startActivity(intent_signup);
                            finish();
                            FirebaseUser user = mAuth.getCurrentUser();
                            Toast.makeText(register.this, "Authentication Successful!",
                                    Toast.LENGTH_SHORT).show();
                        } else {
                            // If sign in fails, display a message to the user.
                            Toast.makeText(register.this, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();
                        }

                        // ...
                    }
                });

    }


    public void registerOnClick(View view)
    {
        regButton.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {

                registerUser();
                insertDataDB();

            }
        });


    }

    public void insertDataDB()
    {
         String username = usernameReg.getText().toString();
         String office = officeReg.getText().toString();
         String job = roleReg.getText().toString();
         String email = emailReg.getText().toString();


        String id = databaseUsers.push().getKey();

        Users user1 = new Users(username, office, job, email);
        databaseUsers.child(id).setValue(user1);


    }

}