sends a notification (preferably) via telegram when a successful SSH login event occurred.
Create a config file in either /etc/default/sshnotification.json or $HOME/.sshnotification/sshnotification.json:
{
"telegram_token": "your-super-secret-bot-token",
"telegram_id": 123456789
}
Add the following line as the last line in /etc/pam.d/sshd:
session optional pam_exec.so /path/to/sshloginnotification