code: public final boolean activateWithEmailToken(String token) {
  		Sysprop s = CoreUtils.getInstance().getDao().read(getAppid(), identifier);
  		if (isValidToken(s, Config._EMAIL_TOKEN, token)) {
  			s.removeProperty(Config._EMAIL_TOKEN);
  			CoreUtils.getInstance().getDao().update(getAppid(), s);
  			setActive(true);
  			update();
  			return true;
  		}
  		return false;
  	}
docs: Activates a user if a given token matches the one stored.
  @param token the email confirmation token. see {@link #generateEmailConfirmationToken() }
  @return true if successful