Wie das umzusetzen, oauth2 in angular2 mit rest-api?

Implementiere ich oauth2 in angular2 mit der rest-api. Backend Entwickler gab mir diese Daten und login-Daten.

private OauthLoginEndPointUrl = 'http://localhost:8000/oauth/token';  

private clientId ='2';

private clientSecret ='fsdfasdfaasdfasdfadsasdfadsfasdf';

Wie kann ich eine Verbindung mit backend mit Passwort geben? Er ist mit laravel passwort

Folgte ich dieses tutorial, aber es scheint veraltet

mein login

<h1>Login</h1>
<form role="form" (submit)="login($event, username.value, password.value)">
  <div class="form-group">
    <label for="username">Username</label>
    <input type="text" #username class="form-control" id="username" placeholder="Username">
  </div>
  <div class="form-group">
    <label for="password">Password</label>
    <input type="password" #password class="form-control" id="password" placeholder="Password">
  </div>
  <button type="submit" class="btn btn-primary btn-block btn-large">Submit</button>
</form>

logincomponent

      login(event, username, password) {

    event.preventDefault();
    this.loginService.login(username, password)
      .subscribe(
        response => {
          console.log("x");
          localStorage.setItem('token', response.access_token);
          this.router.navigate(['/home']);
        },
        error => {
          alert(error);
        }
      );
  }

login.service

import { Injectable } from '@angular/core';
import { Http , URLSearchParams , Response  } from '@angular/http';
import { Observable } from 'rxjs/Rx';


@Injectable()
export class LoginService {
  private OauthLoginEndPointUrl = 'http://localhost:8000/oauth/token';  //Oauth Login EndPointUrl to web API
  private clientId ='2';
  private clientSecret ='A4iX0neXv4LCwpWf0d4m9a8Q78RGeiCzwqfuiezn';

  constructor(public http: Http) {}

  login(username, password) : Observable {
    console.log("obs");
    let params: URLSearchParams = new URLSearchParams();
    params.set('username', username );
    params.set('password', password );
    params.set('client_id', this.clientId );
    params.set('client_secret', this.clientSecret );
    params.set('grant_type', 'password' );

    return this.http.get(this.OauthLoginEndPointUrl , {
      search: params
    }).map(this.handleData)
      .catch(this.handleError);
  }

  private handleData(res: Response) {
    let body = res.json();
    return body;
  }

  private handleError (error: any) {
    //In a real world app, we might use a remote logging infrastructure
    //We'd also dig deeper into the error to get a better message
    let errMsg = (error.message) ? error.message :
      error.status ? `${error.status} - ${error.statusText}` : 'Server error';
    console.error(errMsg); //log to console instead
    return Observable.throw(errMsg);
  }

  public logout() {
    localStorage.removeItem('token');
  }
}

InformationsquelleAutor Tomasz Cysewski | 2017-02-14