Microtik ppp-up and ppp-down scripts Telegram notification

 Global script (go to /system script) name - SendTelegram

:global telegramMessage
:local botid
:local chatid
set botid "TOKEN"
set chatid "USERID"
if ($telegramMessage != "") do={
    /tool fetch url="https://api.telegram.org/bot$botid/sendMessage\?chat_id=$chatid&text=$telegramMessage" keep-result=no
    set telegramMessage ""
}

Up script in the ppp profile

global telegramMessage

:local conTime [:tostr [/system clock get time]]

:local conDate [:tostr [/system clock get date]]

:local remoteAddr

:local callerId

:set remoteAddr $"remote-address"

:set callerId $"caller-id"

:set telegramMessage "Connected $user from $callerId with ip $remoteAddr at $conDate $conTime"

/system script run SendTelegram

Down script in the ppp profile

global telegramMessage

:local conTime [:tostr [/system clock get time]]

:local conDate [:tostr [/system clock get date]] 

:local remoteAddr

:local callerId

:set remoteAddr $"remote-address"

:set callerId $"caller-id"

:set telegramMessage "Disconnected $user from $callerId with ip $remoteAddr at $conDate $conTime"

/system script run SendTelegram

Got from Here and Here