private HttpClientContext context = HttpClientContext.create();public void addUserOAuth(String username,String password){        CredentialsProvider  credsProvider = new BasicCredentialsProvider();        org.apache.http.auth.Credentials credentials = new org.apache.http.auth.UsernamePasswordCredentials(username,password);        credsProvider.setCredentials(org.apache.http.auth.AuthScope.ANY,credentials);        this.context.setCredentialsProvider(credsProvider);    }