anchor.diff:  delete_user_db(User) ->
       UserDb = user_db_name(User),
       try
  -        fabric_db_delete:go(UserDb, [admin_ctx()])
  +        fabric_db_delete:go(UserDb, [?ADMIN_CTX])
       catch error:database_does_not_exist ->
           ok
       end,
  
positive.code:     {false, _} ->
          ok;
      {true, SecProps1} ->
          fabric_db_meta:set_security(UserDb, {SecProps1}, [admin_ctx()])
      end.
  
  user_db_name(User) ->
  
negative.code:     end.
  
  ensure_security(User, UserDb) ->
      {ok, Shards} = fabric_db_meta:get_all_security(UserDb, [?ADMIN_CTX]),
      {_ShardInfo, {SecProps}} = hd(Shards),
      % assert that shards have the same security object
      true = lists:all(fun({_, {SecProps1}}) ->
  