docs: private PortalUser getPortalUser(final String userName) {
          return jdbcOperations.execute(
                  (ConnectionCallback<PortalUser>)
                          con -> {
                              PortalUser portalUser = null;
                              PreparedStatement pstmt = null;
  
                              try {
                                  String query = "SELECT USER_ID FROM UP_USER WHERE USER_NAME=?";
  
                                  pstmt = con.prepareStatement(query);
                                  pstmt.setString(1, userName);
  
                                  ResultSet rs = null;
                                  try {
                                      if (log.isDebugEnabled())
                                          log.debug(
                                                  "RDBMUserIdentityStore::getPortalUID(userName="
                                                          + userName
                                                          + "): "
                                                          + query);
                                      rs = pstmt.executeQuery();
                                      if (rs.next()) {
                                          portalUser = new PortalUser();
                                          portalUser.setUserId(rs.getInt("USER_ID"));
                                          portalUser.setUserName(userName);
                                      }
                                  } finally {
                                      try {
                                          if (rs != null) {
                                              rs.close();
                                          }
                                      } catch (Exception e) {
                                      }
                                  }
                              } finally {
                                  try {
                                      if (pstmt != null) {
                                          pstmt.close();
                                      }
                                  } catch (Exception e) {
                                  }
                              }
  
                              return portalUser;
                          });
      }