docs: public static SnsToken oauth2AccessToken(String appid,String secret,String code){
  		HttpUriRequest httpUriRequest = RequestBuilder.post()
  				.setUri(BASE_URI + "/sns/oauth2/access_token")
  				.addParameter("appid", appid)
  				.addParameter("secret", secret)
  				.addParameter("code", code)
  				.addParameter("grant_type", "authorization_code")
  				.build();
  		return LocalHttpClient.executeJsonResult(httpUriRequest,SnsToken.class);
  	}