  void encode(bufferlist& bl) const {
    __u8 struct_v = 1;
    ::encode(struct_v, bl);
    ::encode(ticket, bl);
    ::encode(session_key, bl);
  }
  void encode(bufferlist& bl) const {
    __u8 struct_v = 1;
    ::encode(struct_v, bl);
    ::encode(ticket, bl);
    ::encode(session_key, bl);
  }