HOSN-app/app/src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { SplashScreen } from '@ionic-native/splash-screen';
import { StatusBar } from '@ionic-native/status-bar';
import { HttpClient, HttpClientModule } from '@angular/common/http';
import { IonicStorageModule } from '@ionic/storage';

import { AuthProvider } from '../providers/auth/auth';

import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';
import { SearchPage } from '../pages/search/search';
import { SettingsPage } from '../pages/settings/settings';
import { LoginPage } from '../pages/login/login';
import { TwitterApiProvider } from '../providers/twitter-api/twitter-api';

@NgModule({
  declarations: [
    MyApp,
    HomePage,
    SearchPage,
    SettingsPage,
    LoginPage
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    IonicModule.forRoot(MyApp),
    IonicStorageModule.forRoot()
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage,
    SearchPage,
    SettingsPage,
    LoginPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    HttpClient,
    { provide: ErrorHandler, useClass: IonicErrorHandler },
    AuthProvider,
    TwitterApiProvider
  ]
})
export class AppModule { }