code: public static AlipayOpenAuthTokenAppResponse openAuthTokenAppToResponse(AlipayOpenAuthTokenAppModel model)
  			throws AlipayApiException {
  		AlipayOpenAuthTokenAppRequest request = new AlipayOpenAuthTokenAppRequest();
  		request.setBizModel(model);
  		return AliPayApiConfigKit.getAliPayApiConfig().getAlipayClient().execute(request);
  	}
docs: 使用app_auth_code换取app_auth_token
  
  @param model
  {AlipayOpenAuthTokenAppModel}
  @return {AlipayOpenAuthTokenAppResponse}
  @throws {AlipayApiException}