How can I find the location of my current user account picture? five years ago, I uploaded a photo as my account picture. 
I tried the ways below, but I still cannot find the location to find the original picture.

my macOS high sierra 10.13.4

~/Library/Containers/

cannot find

com.apple.ImageKit

or

iChat Recent Pictures

and
even /Library/User Pictures cannot find
You can run the following command from terminal to get your user account pictures. This would be an easy way.

dscl . -read /Users/Yourusername JPEGPhoto | tail -1 | xxd -r -p &gt; accountImage.jpg


Just you will get a 256x256 pixel version of your account picture