public static MultiUserAuthorizations readUserAuthsFromZKData(byte[] data)
    throws DeserializationException {
    if (ProtobufUtil.isPBMagicPrefix(data)) {
      int pblen = ProtobufUtil.lengthOfPBMagic();
      try {
        MultiUserAuthorizations.Builder builder = MultiUserAuthorizations.newBuilder();
        ProtobufUtil.mergeFrom(builder, data, pblen, data.length - pblen);
        return builder.build();
      } catch (IOException e) {
        throw new DeserializationException(e);
      }
    }
    return null;
  }
Reads back User auth data written to zookeeper.
@return User auth details
hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java