docs: public GreenMailConfiguration build(Properties properties) {
          GreenMailConfiguration configuration = new GreenMailConfiguration();
          String usersParam = properties.getProperty(GREENMAIL_USERS);
          if (null != usersParam) {
              String[] usersArray = usersParam.split(",");
              for (String user : usersArray) {
                  extractAndAddUser(configuration, user);
              }
          }
          String disabledAuthentication = properties.getProperty(GREENMAIL_AUTH_DISABLED);
          if (null != disabledAuthentication) {
              configuration.withDisabledAuthentication();
          }
          return configuration;
      }