PROBLEM WITH SMB WINDOWS NET

OK, maybe somebody alreay asked this but I wasn’t able to find over the forum:
I have shared a movie folder on my PC.
I use Kodi to navigate to my PC over WIFI BUT when I reach the workgroup KODI asks me to input an ID and a PW.
I did not set up any ID or PW on my shared folder…
What I have to do?

Thank you and regards.