}
        } else {
            // Production: use credentials file or default credentials
            final String credentialsFile = getInitParameter("credentialsFile", null, String.class);
            if (StringUtil.isNotBlank(credentialsFile)) {
                try (InputStream is = new FileInputStream(credentialsFile)) {
                    builder.setCredentials(ServiceAccountCredentials.fromStream(is));

                    builder.setCredentials(NoCredentials.getInstance());
                } else if (StringUtil.isNotBlank(credentialsFile)) {
                    // Use credentials file if specified
                    try (InputStream is = new FileInputStream(credentialsFile)) {
                        builder.setCredentials(ServiceAccountCredentials.fromStream(is));
                    }
                }