How can I retrieve my Canadian eTA?

Question

I have a Canadian eTA (Electronic Travel Authorization) for the last 11 months (I'm working in BC on a Work Permit). Up to now, showing my passport at check-in was enough, as all airlines could retrieve the eTA that is linked to my Passport.

However, on a recent check-in (ANA in Bangkok), I was asked for my eTA.

I searched various URLs found via Google, but none allowed me to retrieve my eTA.

Do you know a URL from which I can get my Canadian eTA?

http://www.cic.gc.ca/english/helpcentre/answer.asp
http://www.cic.gc.ca/english/helpcentre/index-featured-can.asp
https://www.canadaetavisa.com/faq/

Edit 1:

Seems that the Canadian government does not have the option (as of October 2018) to retrieve your eTA off the Internet.
Thus, when you receive your eTA application approval email, be sure to save it (it contains: Status, Name, Passport number, eTA number, and Expiration date).

Answer 1

Here's what I used before, but I was in Canada only for tourist purposes: https://onlineservices-servicesenligne.cic.gc.ca/eta/applicationQuery?lang=en

Answer 2

For my recent flights, I brought a printed copy of the eTA approval email which I had received shortly after the application. I cannot check it right now, but I am pretty sure it contains both my name and passport number.

I am not sure whether this is generally considered a valid proof of an approved eTA, but in my case it was sufficient.