Email Template sharebymail php


I want to make my own email template for the sharebymail app and I would like to know if a PHP variable exists that stands for the email adress of the user which shared the data/file ?

The result in the email that will be send should be like this: “The user with the following email adress [insert email adress from the user which shared the data/file] shared [‘filename’] with you.”

Nextcloud Version 11.0.3

Thank you.