private void prepareEvent() {
   Map<String, Object> params = new HashMap<>();
   params.put(TEMPLATE_PARAM_USERNAME, user.getUserName());
   params.put(EMAIL_PARAM_TO_ADDRESS, user.getEmail());
   params.put(
       TEMPLATE_PARAM_EXPIRATION_DATE,
       user.getSafeLastPasswordChange().plusDays(DAYS_TO_CHANGE_PASSWORD));
   params.put(TEMPLATE_PARAM_LOCALE, user.getLocale());
   params.put(TEMPLATE_PARAM_LAST_PASSWORD_CHANGE, user.getSafeLastPasswordChange());
   params.put(TEMPLATE_PARAM_EXTERNAL_ID, user.getExternalId());
   params.put(TEMPLATE_PARAM_DAYS_TILL_EXPIRE, DAYS_FOR_REMINDER);
   event = new MotechEvent(PASSWORD_CHANGE_REMINDER_EVENT, params);
 }
 private void prepareParams() {
   params = new HashMap<>();
   params.put(TEMPLATE_PARAM_USERNAME, user.getUserName());
   params.put(EMAIL_PARAM_TO_ADDRESS, user.getEmail());
   params.put(
       TEMPLATE_PARAM_EXPIRATION_DATE,
       user.getSafeLastPasswordChange().plusDays(DAYS_TO_CHANGE_PASSWORD));
   params.put(TEMPLATE_PARAM_LOCALE, user.getLocale());
   params.put(TEMPLATE_PARAM_LAST_PASSWORD_CHANGE, user.getSafeLastPasswordChange());
   params.put(TEMPLATE_PARAM_EXTERNAL_ID, user.getExternalId());
   params.put(TEMPLATE_PARAM_DAYS_TILL_EXPIRE, DAYS_FOR_REMINDER);
   params.put(TEMPLATE_PARAM_SERVER_URL, SERVER_URL);
   params.put(TEMPLATE_PARAM_MESSAGES, messageSource);
 }