Question on getting started tutorial

Hi,
I've been following allow with your awesome series, thanks really well done. At about lesson 20 when it comes to setting up token for user password reset email I've tried using user.signed_id and that doesn't work, I'm using ver 6+ someone said in comments very 6 is needed for this functionality which I do..? Any ideas?
Thanks,
Andrew

I'm not an expert, but I would like to help you. It's difficult for me to understand at what point your error occurs. Could you record the screen? Perhaps it will be easier to solve with the video.