anchor.diff:      Homeway = {account, "homeway"},
       D4 = #{account => "homeway", password => "123456"},
       ?assertMatch({ok, _}, W:call(Res, create, [D4, M1])),
  -    W:reg_server(Homeway, [{ss_account, [#{db=>Db}]}]),
  +    W:reg_server(Homeway, ss_account, [#{db=>Db}]),
       ?assertMatch(ok, W:call(Homeway, login, ["homeway", "123456"])),
   
       %% homeway添加adi为联系人，双方在线
  
positive.code:     ?assertMatch(ok, W:call(Res, update, [Id1, D3, M3])),
  
      %% 出席
      W:reg_server(Yifan, [{ss_account, [#{db=>Db}]}]),
      W:call(Yifan, connect, self()),
      ?assertMatch(not_login, W:call(Yifan, contacts)),
      ?assertMatch(ok, W:call(Yifan, login, ["yifan", "123456"])),
  
negative.code:     Xiaojie = {account, "xiaojie"},
      D8 = #{account => "xiaojie", password => "123456"},
      ?assertMatch({ok, _}, W:call(Res, create, [D8, M1])),
      W:reg_server(Xiaojie, ss_account, [#{db=>Db}]),
      W:call(Xiaojie, connect, [self()]),
      ?assertMatch(ok, W:call(Xiaojie, login, ["xiaojie", "123456"])),
      clear_msg(),
  