This shell script can be used to get

getOtacOverEmail.sh

#!/bin/zsh
emailToExtractOtacFrom=$1
emailToSendMagicLinkTo=$2

otacValue=$(curl -s https://aws-sns-stub.dev.moneynp.xinja.com.au/aws-sns-stub/email/address/$emailToExtractOtacFrom | jq '.[0].message.body.html.data' | grep otac= | awk -F 'otac=' '{print $2}' | cut -d "\\" -f 1)
emailBodyText='Magic Link ==>> '
emailBodyMagicLink=https://native-support.dev.moneynp.xinja.com.au/information/install?otac=$otacValue


curl -s --user 'api:79c45e782acba502516875093739f9b6-4836d8f5-68302a5e' \
    https://api.mailgun.net/v3/sandbox8986c735df494cef9b27bf1164919583.mailgun.org/messages \
        -F from='Mailgun Sandbox <postmaster@sandbox8986c735df494cef9b27bf1164919583.mailgun.org>' \
        -F to=$emailToSendMagicLinkTo \
        -F subject='Xinja Magic Link' \
        -F text=$emailBodyText$emailBodyMagicLink
        
# How to use:
# ./getOtacOverEmail.sh <<email_to_which_otac_was_sent>> <<email_to_which_magic_link_should_be_sent>>
# Replace the values marked by <<>> with the respective emails. The otac will be extracted FOR the FIRST email value and sent to the SECOND email value.