I am working on an app and using firebase app invite so app user can invite their friends using the firebase app invite mechanism. Overall, it seems to work fine but I want to customize the email msg/subject of the invite that gets sent out and include name of the person to whom I am inviting in the message. So if I have John Smith and Foo Bar as friends, when I send emails out, I want the emails to start with Hi John! or Hi Foo!.
I couldn't find a way to pass the names selected to my email (like APPINVITE_LINK_PLACEHOLDER for app link). I tried %FIRST_NAME% but that doesn't work either. What special variables should I use for this? The best practices for firebase app invite recommends to customize the email message, so I suppose there is some way to do this but I can't seem to find it. Any help would be appreciated.
Thanks in advance, Abhijit