It鈥檇 be amazing to have the CLI generate a QR code to scan and open the URL.
Hi I know this isn't exactly what you asked for, but this is a temporary solution that might help you,
this will create and ngrok connection and open your browser to the QR code for the connection.
ngrok http 8080 > /dev/null &2>1; open $(curl -s http://localhost:4040/api/tunnels | jq ".tunnels[1].public_url" | xargs -I{} echo "https://chart.googleapis.com/chart?cht=qr&chl={}&chs=180x180&choe=UTF-8&chld=L|2")
and a slightly more portable version, in case jq isn't installed
ngrok http 8080 > /dev/null &2>1; open $(curl -s http://localhost:4040/api/tunnels | egrep -o 'https:\/\/.{8}.ngrok.io' | xargs -I{} echo "https://chart.googleapis.com/chart?cht=qr&chl={}&chs=180x180&choe=UTF-8&chld=L|2")
PR #472 looks like it implements this. It's currently failing CI, and un-merged.