import {Injectable} from '@angular/core';
import {Http, Headers} from '@angular/http';

@Injectable()
export class ApiService {

   constructor(private http: Http) {}

   call(url): Observable<any> {
      let username: string = 'username';
      let password: string = 'password';
      let headers: Headers = new Headers();
      headers.append("Authorization", "Basic " + btoa(username + ":" + password));
      return this.http.get(url, {headers: headers})
    }
}