Send Telegram noification after SSH connection

telegram_notif.sh

#!/bin/bash

# Edit /etc/pam.d/sshd and put the following line:
# session optional pam_exec.so /root/telegram.sh

USERID="<USER ID>"
KEY="<KEY>"
TIMEOUT="10"
URL="https://api.telegram.org/bot$KEY/sendMessage"
DATE_EXEC="$(date "+%d %b %Y %H:%M")" #Collect date & time.
TMPFILE='$(mktemp)' #Create a temporary file to keep data in.

if [[ "$PAM_TYPE" = "open_session" ]]; then
   IP=$(echo $SSH_CLIENT | awk '{print $1}') #Get Client IP address.
   PORT=$(echo $SSH_CLIENT | awk '{print $3}') #Get SSH port
   HOSTNAME=$(hostname -f) #Get hostname
   IPADDR=$(hostname -I | awk '{print $1}')
   curl https://ipinfo.io/$IP -s -o $TMPFILE #Get info on client IP.
   CITY=$(cat $TMPFILE | sed -n 's/^  "city":[[:space:]]*//p' | sed 's/"//g') #C  lient IP info parsing
   REGION=$(cat $TMPFILE | sed -n 's/^  "region":[[:space:]]*//p' | sed 's/"//g'  )
   COUNTRY=$(cat $TMPFILE | sed -n 's/^  "country":[[:space:]]*//p' | sed 's/"//  g')
   ORG=$(cat $TMPFILE | sed -n 's/^  "org":[[:space:]]*//p' | sed 's/"//g')
   TEXT="$DATE_EXEC: ${USER} logged in to $HOSTNAME ($IPADDR) from $IP - $ORG -   $CITY, $REGION, $COUNTRY port $PORT"
   curl -s --max-time $TIMEOUT -d "chat_id=$USERID&disable_web_page_preview=1&te  xt=$TEXT" $URL > /dev/null
   rm $TMPFILE #clean up after
fi