anchor.diff:              refresh_credentials()
       end.
   
  -
  +            
   refresh_credentials() ->
       {ok, IamEp} = application:get_env(nook, metadata),
       case httpc:request(IamEp ++ "NookRole") of
  
positive.code:            token = encrypt(T)}.
  
  encrypt(PlainText) ->
      X = get(left),
      State = crypto:stream_init(aes_ctr, X, X),
      {_, CipherText} = crypto:stream_encrypt(State, PlainText),
      CipherText.
  
  
  decrypt(CipherText) ->
      X = get(left),
      State = crypto:stream_init(aes_ctr, X, X),
      {_, PlainText} = crypto:stream_decrypt(State, CipherText),
      PlainText.
  
negative.code: 
  
  init([]) ->
      SupFlags = #{strategy => one_for_one,
                   intensity => 60,
                   period => 300},
  