I'm the PA, I did not receive any email too. The AOR went to the Sponsor's email. What I did is I created a GCKey user ID and password over at
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/account.html
You'll be asked to input your details etc and just go through the steps, you will then link your application to the online account. Once you linked your account, you will receive an email that says "Your application (FXXXXXXXXX) was successfully linked!"
The temp number some people are talking about is the number they get when they haven't receive AOR and wanted to check their progress. Sometimes they are given this "temp number" when they call in to let them know their application was received and will be getting AOR soon.