Alternative way to get PSN Base64 ID?

Was trying to link up my PS4 and steam deck using Chiaki but it seems that the usual link that people used to get their PSN ID no longer works (it just gives me "an error occurred processing your request" message no matter how many times I've tried on any device). I've tried downloading a save file onto a USB as I've heard that it would show the PSN ID but either that doesn't work unless I jailbreak the PS4 or I'm doing it wrong.

I just want to play my ps4 games on my bed instead of my desk :')

Help please!

Edit: Finally managed to make it work! I don't know why the link from this youtube video worked and the others didn't, but this worked pretty neatly for me!

https://www.youtube.com/watch?v=LNmL91hz_pw

Good luck!