I'm not sure if this is still the case but there was a period of time when email clients would not transform the entire URL into a clickable link if it was too

I'm not sure if this is still the case but there was a period of time when email clients would not transform the entire URL into a clickable link if it was too long. These were generally email clients which supported plain text only. Anyway, I think that I'd be okay with a shortener like your example as long as it: 1. Required me to enter my user id again 2. Was only valid for 30 minutes