docs: public static Authentication build(String crypt) throws IllegalArgumentException {
          if(crypt == null) {
              return new PlainAuth(null);
          }
          String[] value = crypt.split(":");
          
          if(value.length == 2 ) {
              String type = value[0].trim();
              String password = value[1].trim();
              if(password!=null&&password.length()>0) {
                  if("plain".equals(type)) {
                      return new PlainAuth(password);
                  }
                  if("md5".equals(type)) {
                      return new Md5Auth(password);
                  }
                  if("crc32".equals(type)) {
                      return new Crc32Auth(Long.parseLong(password));
                  }
              }
          }
          throw new IllegalArgumentException("error password: "+crypt);
      }