Please someone help me in Angular 2 http get

Please someone help me in Angular 2 http get
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I have tried to fetch user api data from github, by angular 2 http, it works because response is like { }. But when I try to fetch data for repositories of the same user it returns a response like [{},{},{},]. I can handle that response in simple JavaScript but via angular 2 http get it returns response successfully but shows [object Object],[object Object] in console if I try to console.log it. But when I try to access inner properties like respone[0].name it says undefined. Here is the code:

import { Component, OnInit } from '@angular/core';
import { GithubProfile,RepoProfile } from  '../github-profile';
import { GitHubAPIService } from '../git-hub-api.service';

  selector: 'app-github-profile',
  template: `
  <div class="row">
    <div class="col-md-12 alert alert-info" [hidden]="!charging">Charging..</div>
    <div class="col-md-4">
      <form name="form" class="form" (ngSubmit)="findProfile()" novalidate>
        <div class="form-group">
          <label for="username">Username:</label>
          <input id="username" type="text" class="form-control"  [(ngModel)]="username" name="username" #user="ngModel" required>
          <div [hidden]="user.valid" class="alert alert-danger">This field can't be blank</div>
        <button class="btn btn-success" type="submit" [disabled]="user.invalid">Find</button>
    <div class="col-md-8 text-center">
      <div class="row">
        <div class="col-sm-6 col-md-4" *ngIf="auxProfile">
          <div class="thumbnail">
            <img src="{{auxProfile.avatar_url}}" alt="user_avatar">
            <div class="caption">
              <a  href="{{auxProfile.repos_url}}" (click)="findRepo(auxProfile.repos_url )" class="btn btn-primary" role="button">Show Repositories</a>

      <div class="col-sm-12 col-md-12" *ngIf="repoProfile">

          <div *ngFor= "let repo of repoProfile; let i = index;">
          <a href="{{repo[i].contributors_url}}" class="btn btn-danger">{{repo[i].name}}</a>



  providers: [GitHubAPIService]
export class GithubProfileComponent implements OnInit {
  auxProfile: GithubProfile = null;
  repoProfile: RepoProfile;
  errorMessage: string;
  username = 'angular';
  repoUrl= '';
  charging: boolean;

  constructor(private gitHubAPIService: GitHubAPIService) {
    this.charging = false;

  ngOnInit() {


    this.charging = true;
       .subscribe(profile => {this.auxProfile = profile; this.charging = false},
                  error => {this.errorMessage = error; this.charging = false;});
  findRepo(repoUrl) {
  response => { this.repoProfile = response;console.log("Success Response" + this.repoProfile);},
    error => { console.log("Error happened" + error)},
    () => { console.log("the subscription is completed")}


And the services for the same component where getRepo() method is actually called is having this code:

import { Injectable } from '@angular/core';
import { GithubProfile,RepoProfile} from './github-profile';
import { Http, Response } from '@angular/http';
import { Observable }  from 'rxjs/Observable';

export class GitHubAPIService {

 constructor (private http: Http) {}

  private  GITHUB_API_URL = '';

  getProfile(username:string) : Observable<GithubProfile>{
   return this.http.get(`${this.GITHUB_API_URL}${username}`)
getRepo(repoUrl:string) : Observable<RepoProfile>{
  return this.http.get(`${repoUrl}`)
         .map(response => response.json())
 private extractData(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);


and I have one more code for RepoProfile, it used to decide that this kind of object will be returned it is used in getRepo():Observable{}

export class GithubProfile {
  name: string;
  location: string;
  avatarUrl: string;
  login: string

  constructor(login: string, name: string, location: string, avatarUrl: string) { = name;
    this.login = login;
    this.avatarUrl = avatarUrl;
    this.location = location;

export class RepoProfile {
  name: string;
  contributors_url: string;

constructor( name: string, contributors_url: string) { = name;
    this.contributors_url = contributors_url;