Firebase registration - using @angular/fire plugin

Ionic Framework
1

Pushing user data from successful registration to firebase DB against user unique id -

to install use command - npm i firebase @angular/fire --save

---------------------------------------------------------------------------
// Initialize firebase -

firebase.config.ts

var config = {
    apiKey: "XXXXXXXXXXXXXXXXXXXXX",
    authDomain: "XXXXXXXXXXXXXXXXXX",
    databaseURL: "XXXXXXXXXXXXXXXXX",
    projectId: "XXX-22ba4",
    storageBucket: "XXXXXXXXX-XXXXX.appspot.com",
    messagingSenderId: "1022661456269"
  };

initialize app using - AngularFireModule.initializeApp(firebaseConfig) into your app.module.ts imported from @angular/fire

app.module.ts -

import { AngularFireModule } from '@angular/fire';
import { AngularFireAuthModule } from '@angular/fire/auth';
import { AngularFireDatabaseModule } from '@angular/fire/database';

@NgModule({
  declarations: [AppComponent],
  entryComponents: [],
  imports: [
    BrowserModule,
    IonicModule.forRoot(),
    AppRoutingModule,
    AngularFireModule.initializeApp(firebaseConfig),
    AngularFireAuthModule,
    AngularFireDatabaseModule
  ]

--------------------------------------------------------------

user.config.ts -

export interface Profile {
    firstName:string,
    lastName:string,
    picture:string
}

export interface User{
    email:string,
    password:string
}

----------------------------------------------------------------
home.page.ts

user ={} as User;
profile ={} as Profile;


async registerUser(){
    try{
      this.fireAuth.auth.createUserAndRetrieveDataWithEmailAndPassword(this.user.email, this.user.password).then(response =>{
        if(response.user.uid)
          this.fireDatabase.object(`${response.user.uid}`).set(this.profile).then(response =>{
            console.log('User data is pushed.', response);
            this.navCtrl.navigateRoot('home');
          });
        else 
          throw 'Failed to store user data';
      })
    }catch(e){
      console.log('some error', e);
    }
  }

hope this may help.