Ionic Twitter Auth login function

ionic twitter auth

import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { LoadingController } from '@ionic/angular';
import { TwitterConnect } from '@ionic-native/twitter-connect/ngx';
import { NativeStorage } from '@ionic-native/native-storage/ngx';

@Component({
  selector: 'app-home',
  templateUrl: 'home.page.html',
  styleUrls: ['home.page.scss'],
})
export class HomePage {
  loading: any;
  constructor(
    private router: Router,
    public loadingController: LoadingController,
    private nativeStorage: NativeStorage,
    private twitter: TwitterConnect
  ) {

  }

  async ngOnInit() {
    this.loading = await this.loadingController.create({
      message: 'Connecting ...'
    });
  }

  async presentLoading(loading) {
    return await loading.present();
  }

  async login() {
    // show loader
    this.presentLoading(this.loading);
    // login with twitter
    this.twitter.login().then((res) => this.onLoginSuccess(res), (err) => this.onLoginError(err))
  }
  onLoginSuccess(res) {
    console.log(res);
    this.twitter.showUser()
      .then(user => {
        console.log('User Profile:');
        console.log(user);
        console.log('Twitter handle :' + user.screen_name);
        this.loading.dismiss();
      },
        // the plugin currently goes in error even if login is a success
        err => {
          console.log('Error retrieving user profile');
          console.log(err);
          // Modify profile image url to get bigger image 
          var user_image = err.profile_image_url_https.replace('_normal', '');
          this.nativeStorage.setItem('user_data', {
            name: err.name,
            handle: err.screen_name,
            followers: err.followers_count,
            profile_image: user_image,
            banner: err.profile_banner_url,
            location: err.location
          })
            .then(() => {
              this.router.navigate(["/profile"]);
              this.loading.dismiss();
            }, (error) => {
              console.log(error);
              this.loading.dismiss();
            })
        })
  }
  onLoginError(err) {
    console.log(err);
  }
}