anchor.diff:          , create_user/1
           , unique_user/1
           , bad_credentials/1
  +        , complete_coverage/1
           ]).
   
   -spec all() -> [atom()].
  
positive.code:   %get match with bad id
    {ok, #{status_code := 404}} =
           api_call(get, "/matches/123456", Headers1),
    ok.
  
  -spec get_matches(config()) -> true.
  get_matches(_Config) ->
  
negative.code:   <<"won_by_player2">> = maps:get(<<"status">>, BodyDecode),
    ok.
  
  -spec complete_coverage(config()) -> ok.
  complete_coverage(_Config) ->
    try fiar_auth:credentials(bad_attribute) of
      Credentials -> throw({error, Credentials})
    catch
      _ -> ok
    end.
  
  %% @private
  drop_chips([], Mid, [Header, _]) -> 
    api_call(get, "/matches/"++Mid, Header, #{});
  