@Override
  public String getConsolidatorToken(PerunSession sess) throws PerunException {

    Map<String, Object> value = new HashMap<String, Object>();

    String actor = sess.getPerunPrincipal().getActor();
    String extSourceName = sess.getPerunPrincipal().getExtSourceName();
    String extSourceType = sess.getPerunPrincipal().getExtSourceType();
    Integer extSourceLoa = sess.getPerunPrincipal().getExtSourceLoa();
    User user = sess.getPerunPrincipal().getUser();

    value.put("actor", actor);
    value.put("extSourceName", extSourceName);
    value.put("extSourceType", extSourceType);
    value.put("extSourceLoa", extSourceLoa);
    value.put("user", user);

    // create token from actual properties
    String token =
        registrarManager
            .getMailManager()
            .getMessageAuthenticationCode(
                System.currentTimeMillis() + actor + extSourceName + extSourceType + extSourceLoa);

    requestCache.putIfAbsent(token, value);

    return token;
  }
  @Override
  public List<Identity> checkForSimilarUsers(PerunSession sess, int appId) throws PerunException {

    String email = "";
    String name = "";
    List<RichUser> result = new ArrayList<RichUser>();

    List<String> attrNames = new ArrayList<String>();
    attrNames.add("urn:perun:user:attribute-def:def:preferredMail");
    attrNames.add("urn:perun:user:attribute-def:def:organization");

    Application app = registrarManager.getApplicationById(registrarSession, appId);

    if (app.getGroup() == null) {
      if (!AuthzResolver.isAuthorized(sess, Role.VOADMIN, app.getVo())) {
        if (sess.getPerunPrincipal().getUser() != null) {
          // check if application to find similar users by belongs to user
          if (!sess.getPerunPrincipal().getUser().equals(app.getUser()))
            throw new PrivilegeException("checkForSimilarUsers");
        } else {
          if (!sess.getPerunPrincipal().getExtSourceName().equals(app.getExtSourceName())
              && !sess.getPerunPrincipal().getActor().equals(app.getCreatedBy()))
            throw new PrivilegeException("checkForSimilarUsers");
        }
      }
    } else {
      if (!AuthzResolver.isAuthorized(sess, Role.VOADMIN, app.getVo())
          && !AuthzResolver.isAuthorized(sess, Role.GROUPADMIN, app.getGroup())) {
        if (sess.getPerunPrincipal().getUser() != null) {
          // check if application to find similar users by belongs to user
          if (!sess.getPerunPrincipal().getUser().equals(app.getUser()))
            throw new PrivilegeException("checkForSimilarUsers");
        } else {
          if (!sess.getPerunPrincipal().getExtSourceName().equals(app.getExtSourceName())
              && !sess.getPerunPrincipal().getActor().equals(app.getCreatedBy()))
            throw new PrivilegeException("checkForSimilarUsers");
        }
      }
    }

    // only for initial VO applications if user==null
    if (app.getType().equals(Application.AppType.INITIAL)
        && app.getGroup() == null
        && app.getUser() == null) {

      try {
        User u =
            perun
                .getUsersManager()
                .getUserByExtSourceNameAndExtLogin(
                    registrarSession, app.getExtSourceName(), app.getCreatedBy());
        if (u != null) {
          // user connected his identity after app creation and before it's approval.
          // do not show error message in GUI by returning an empty array.
          return convertToIdentities(result);
        }
      } catch (Exception ex) {
        // we don't care, let's try to search by name
      }

      List<ApplicationFormItemData> data = registrarManager.getApplicationDataById(sess, appId);

      // search by email, which should be unique (check is more precise)
      for (ApplicationFormItemData item : data) {
        if ("urn:perun:user:attribute-def:def:preferredMail"
            .equals(item.getFormItem().getPerunDestinationAttribute())) {
          email = item.getValue();
        }
        if (email != null && !email.isEmpty()) break;
      }

      List<RichUser> users =
          (email != null && !email.isEmpty())
              ? perun
                  .getUsersManager()
                  .findRichUsersWithAttributesByExactMatch(registrarSession, email, attrNames)
              : new ArrayList<RichUser>();

      if (users != null && !users.isEmpty()) {
        // found by preferredMail
        return convertToIdentities(users);
      }

      // search by different mail

      email = ""; // clear previous value
      for (ApplicationFormItemData item : data) {
        if ("urn:perun:member:attribute-def:def:mail"
            .equals(item.getFormItem().getPerunDestinationAttribute())) {
          email = item.getValue();
        }
        if (email != null && !email.isEmpty()) break;
      }

      users =
          (email != null && !email.isEmpty())
              ? perun
                  .getUsersManager()
                  .findRichUsersWithAttributesByExactMatch(registrarSession, email, attrNames)
              : new ArrayList<RichUser>();
      if (users != null && !users.isEmpty()) {
        // found by member mail
        return convertToIdentities(users);
      }

      // continue to search by display name

      for (ApplicationFormItemData item : data) {
        if (RegistrarManagerImpl.URN_USER_DISPLAY_NAME.equals(
            item.getFormItem().getPerunDestinationAttribute())) {
          name = item.getValue();
          // use parsed name to drop mistakes on IDP side
          try {
            if (name != null && !name.isEmpty()) {
              Map<String, String> nameMap = Utils.parseCommonName(name);
              // drop name titles to spread search
              String newName = "";
              if (nameMap.get("firstName") != null && !nameMap.get("firstName").isEmpty()) {
                newName += nameMap.get("firstName") + " ";
              }
              if (nameMap.get("lastName") != null && !nameMap.get("lastName").isEmpty()) {
                newName += nameMap.get("lastName");
              }
              // fill parsed name instead of input
              if (newName != null && !newName.isEmpty()) {
                name = newName;
              }
            }
          } catch (Exception ex) {
            log.error(
                "[REGISTRAR] Unable to parse new user's display/common name when searching for similar users. Exception: {}",
                ex);
          }
          if (name != null && !name.isEmpty()) break;
        }
      }

      users =
          (name != null && !name.isEmpty())
              ? perun
                  .getUsersManager()
                  .findRichUsersWithAttributesByExactMatch(registrarSession, name, attrNames)
              : new ArrayList<RichUser>();
      if (users != null && !users.isEmpty()) {
        // found by member display name
        return convertToIdentities(users);
      }

      // continue to search by last name

      name = ""; // clear previous value
      for (ApplicationFormItemData item : data) {
        if (RegistrarManagerImpl.URN_USER_LAST_NAME.equals(
            item.getFormItem().getPerunDestinationAttribute())) {
          name = item.getValue();
          if (name != null && !name.isEmpty()) break;
        }
      }

      if (name != null && !name.isEmpty()) {
        // what was found by name
        return convertToIdentities(
            perun
                .getUsersManager()
                .findRichUsersWithAttributesByExactMatch(registrarSession, name, attrNames));
      } else {
        // not found by name
        return convertToIdentities(result);
      }

    } else {
      // not found, since not proper type of application to check users for
      return convertToIdentities(result);
    }
  }