Where to copy and paste Google OAuth after authentication's code?
<p>After got authenticated with Google <a href="https://github.com/google/gtm-oauth2" rel="nofollow">GTM OAUTH 2</a>, there is another HTML page with instruction of "Please copy this code, switch to your application and paste it there" with code inside textfield below it.</p>

<p>Where to put this code?</p>

<p>While I also notice it prints this error:</p>

<pre><code>GTMOAuth2Authentication 0x17236500: {code="some_code..."} || Error Domain=com.google.HTTPStatus Code=401 "(null)" UserInfo={data=&lt;7b0a2022 and_some_data 0a&gt;, json={
    error = "invalid_client";
    "error_description" = Unauthorized;
}}
</code></pre>

<p>and the code itself always is always changed after authentication. It seems the code is per session.</p>

<p>Any advise everyone?</p>