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);

    }