How To get ngrok working with SSH on WSL

Having lots of fun testing ngrok. As of today, here’s how I was able to get ngrok working with ssh from macOS to WSL (DISCLAIMER: Step 3 may not be kosher :-) ! The following is unsupported and use at your own risk! Please be careful!):
0. Start the ssh service in WSL e.g. on ubuntu sudo systemctl enable ssh
1. Generate an SSH Key on your mac (I used the github directions:Generating a new SSH key and adding it to the ssh-agent and of course used *.tcp.ngrok.io instead of *.github.com), let’s call it wsl2. This key must have a passphrase or it won’t work.
- Add it to the keychain: ssh-add -K ~/.ssh/wsl2 <- from SO: How can I permanently add my SSH private key to Keychain so it is automatically available to ssh?
2. Copy the public key to the WSL machine e.g. using croc croc ~/.ssh/wsl2.pub
3. Rename the nologin file to allow logins to WSL (Otherwise ssh will fail with a pam_nologin error):
```
sudo mv /var/run/nologin /var/run/2023-01-31-renamed-nologin
```
4. start ngrok ngrok tcp 22
5. SSH in e.g. ssh -i ~/.ssh/wsl2.pub roland@somehost.tcp.ngrok.io -p <someport>