if (defaultPassword != null && defaultPassword.trim().length() > 0) {
config.setDefaultPassword(defaultPassword.trim());
}
UserStoreManager userStore = this.realm.getUserStoreManager();
if (fileName.endsWith("csv")) {
CSVUserBulkImport csvAdder = new CSVUserBulkImport(config);
csvAdder.addUserList(userStore);
} else if (fileName.endsWith("xls") || fileName.endsWith("xlsx")) {
ExcelUserBulkImport excelAdder = new ExcelUserBulkImport(config);
excelAdder.addUserList(userStore);
} else {
throw new UserAdminException("Unsupported format");