...
${sender} - user sending the message,
${title} - title of page,
${password} - optional password used to protect shared link,
${url} - unique shared link url address,
${registrationUrl} - link to registration url, used in case when ‘Selected Users' are filled on shared linkis filled, added when email is send to user who didn’t confirmed their account yet,
${expiration} - optional expiration date of shared link.
...