{
  "rules": {
     ".read": "true",
     ".write": "auth != null"
  }
}

import firebase from 'firebase/compat/app';
import { environment } from '../environments/environment';
firebase.initializeApp(environment.firebase)

  writeDataToDatabase(data: any): Observable<any> {
    const email = 'mail@gmail.com';
    const password = 'pass';
  
    // Authenticate the user
    return from(firebase.auth().signInWithEmailAndPassword(email, password)).pipe(
      switchMap((userCredential: any) => {
        // User is now authenticated
        console.log('Authentication successful');
        console.log(userCredential); // Log userCredential to verify its value
    
        // Get the access token from the user credential
        return from(userCredential.user.getIdToken()).pipe(
          switchMap((accessToken) => {
            // Create headers and add the access token
            const headers = new HttpHeaders({
              'Content-Type': 'application/json',
              Authorization: `Bearer ${accessToken}`
            });
    
            console.log(headers); // Log headers to verify its value
    
            // Make the HTTP request with the headers
            return this.httpClient.get('<URL>/ip.json', { headers });
          })
        );
      })
    );
  }

    const data = { name: 'John Doe', age: 25 };
    this.writeDataToDatabase(data).subscribe(
      response => {
        console.log('Data written successfully:', response);
      },
      error => {
        console.error('Error writing data:', error);
      }
    );