login(name: string, password:string){
    let headers = new Headers({ 'Content-Type': 'application/json' })
        let user = {
            "email": name,
            "password": password,
        }
    console.log(JSON.stringify(user));
    return this.http.post(this.apiUrl + '/auth/local', JSON.stringify(user),{ headers: headers }).map(
        (response: Response) => response.json()).catch((error:any) => Observable.throw(error.json().error || 'Server error'));
 }