Zugriff auf Shopware REST API mit idHTTP

[mocition]

Mit Digest Authetifizierung bekomm ich: HTTP/1.1 400 Bad Request

Code:

var MemoryStream: TMemoryStream;
begin
  MemoryStream := TMemoryStream.Create;
  try
    IdHTTP1.Request.URL := 'http://localhost/api';

    IdHTTP1.Request.Authentication := TIdDigestAuthentication.Create;
    IdHTTP1.Request.Authentication.Username  := 'meinApiUser';
    IdHTTP1.Request.Authentication.Password  := 'meinApiKey';

    IdHTTP1.get(IdHTTP1.Request.URL, MemoryStream);
    MemoryStream.Position := 0;
    Memo1.Lines.LoadFromStream(MemoryStream);
  finally
    MemoryStream.Free;
  end;