Handle res

export class AppComponent implements OnInit {
  .
  .
  .
  
  handleData(data) {
    console.log('Here are the usable data', data);
    // Insert Business logic here
  }

  handleComplete() {
    console.log('Complete');
  }

  handleError(error) {
    console.log('error:', error)
    return Observable.throw(error);
  }
  .
  .
  .
}