@Injectable()
export class HttpService {

  constructor(private http: HttpClient) { }
  public login(email, password) {
    const aUsername = "client";
    const aPassword = "clientpassword";
    const headers: HttpHeaders = new HttpHeaders();
    headers.append("Content-Type", "application/x-www-form-urlencoded");
    headers.append("Authorization", "Basic" + btoa(aUsername + ':' + aPassword));
    const params = { grant_type: "password", username: email, password: password };
    console.log(address + "/oauth/token", params, {headers: headers});
    return this.http.post(address + "/oauth/token", params, {headers: headers});
}
}