/**
* Access token data is returned to the gadget as json key/value pairs:
*
* { "user_id": "12345678" }
*/
private HttpResponseBuilder formatAccessTokenData()
{
HttpResponseBuilder builder = new HttpResponseBuilder();
builder.setHeader("Content-Type", "application/json; charset=utf-8");
builder.setHttpStatusCode((int)HttpStatusCode.OK);
// no need to cache this, these requests should be fairly rare, and the results should be
// cached in gadget.
builder.setStrictNoCache();
JsonObject json = new JsonObject(accessTokenData);
builder.setResponseString(json.ToString());
return(builder);
}