code: public String generateEmailConfirmationToken() {
  		if (StringUtils.isBlank(identifier)) {
  			return "";
  		}
  		Sysprop s = CoreUtils.getInstance().getDao().read(getAppid(), identifier);
  		if (s != null) {
  			String token = Utils.base64encURL(Utils.generateSecurityToken().getBytes());
  			s.addProperty(Config._EMAIL_TOKEN, token);
  			CoreUtils.getInstance().getDao().update(getAppid(), s);
  			return token;
  		}
  		return "";
  	}
docs: Generates a new email confirmation token. Sent via email for user activation.
  @return a Base64 encoded UUID