Firebase Realtime database is not showing data that is being written from android studio

I am having a problem writing into Firebase real-time database. The app is running fine with no build errors. but when I look into the database nothing is changing. I am trying to write into the database. The account which is logged in in Android and Firebase is the same. I have also given the internet permission in the manifest file. I have included the JSON file in the project. I have added all the required dependencies in gradle. the gradle file

`

  package com.example.firebasehometry;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class MainActivity extends AppCompatActivity {
FirebaseDatabase database;
DatabaseReference reference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
database = FirebaseDatabase.getInstance("https://fir-home-53258-default-rtdb.firebaseio.com/");
reference = database.getReference("student");
add();
}
public void add(){
Toast.makeText(this, "before adding", Toast.LENGTH_SHORT).show();
reference.setValue("ashar khan").addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(MainActivity.this, "Successfully inserted", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(MainActivity.this, "Error inserting", Toast.LENGTH_SHORT).show();
}
});
}
}

plugins {
id 'com.android.application'
id 'com.google.gms.google-services'
}
android {
namespace 'com.example.firebasehometry'
compileSdk 33
defaultConfig {
applicationId "com.example.firebasehometry"
minSdk 25
targetSdk 33
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation platform('com.google.firebase:firebase-bom:32.0.0')
implementation 'androidx.appcompat:appcompat:1.6.1'
implementation 'com.google.firebase:firebase-analytics'
implementation 'com.google.android.material:material:1.9.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'com.google.firebase:firebase-database:20.0.4'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.5'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
}

enter image description here

buildscript {
repositories {
// Make sure that you have the following two repositories
google()  // Google's Maven repository
mavenCentral()  // Maven Central repository
}
dependencies {
classpath 'com.google.gms:google-services:4.3.15'
}
}// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
id 'com.android.application' version '7.4.0' apply false
id 'com.android.library' version '7.4.0' apply false
}

`

I tried all the methods that are available on internet but still realtime database is not updating. Anyone who can help me in this matter..

Pass no parameters in getInstance() of FirebaseDatabase

FirebaseDatabase fd= FirebaseDatabase.getInstance();
make sure your project is connected with your Firebase console through the google-services.json file provided.