anchor.diff:  
   %% API
   -export([start_link/0,
  +         get_posts/1,
            login/0,
            post/2,
            is_logged_in/0
  
positive.code: 
  is_logged_in() ->
      gen_server:call(?MODULE, {is_logged_in}).
  
  %%%===================================================================
  %%% gen_server callbacks
  
negative.code:         [],
          []
       ).
  
  get_posts(Feed, State) ->
      Token = State#state.token,
      {ok, {_StatusCode, _Headers, Data}} = httpc:request(
          get,
          {
              "https://freefeed.net/v1/timelines/" ++ Feed,
              [{"x-authentication-token", binary_to_list(Token)}]
          },
          [],
          []
       ),
      Response = jiffy:decode(Data, [return_maps]),
      #{<<"posts">> := Posts} = Response,
      Posts.
  