code: public void setUserInfo(String username, String infoName, String value) throws CmsException {
  
          CmsUser user = m_cms.readUser(username);
          user.setAdditionalInfo(infoName, value);
          m_cms.writeUser(user);
      }
docs: Sets a string-valued additional info entry on the user.
  
  @param username the name of the user
  @param infoName the additional info key
  @param value the additional info value
  
  @throws CmsException if something goes wrong