private com.google.protobuf.ByteString getUseridBytes() {
      java.lang.Object ref = userid_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
        userid_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }