docs: public void setDefaultPasswordHashCreatorAlgorithm (@Nonnull @Nonempty final String sAlgorithm)
    {
      ValueEnforcer.notEmpty (sAlgorithm, "Algorithm");
  
      m_aRWLock.writeLocked ( () -> {
        final IPasswordHashCreator aPHC = m_aPasswordHashCreators.get (sAlgorithm);
        if (aPHC == null)
          throw new IllegalArgumentException ("No PasswordHashCreator registered for algorithm '" + sAlgorithm + "'");
        m_aDefaultPasswordHashCreator = aPHC;
      });
      LOGGER.info ("Default PasswordHashCreator algorithm set to '" + sAlgorithm + "'");
    }