Expression in VBAFE to default e-mail address based on logged in user

I was wondering if it is possible to use an expression in Visual Builder Add-in for Excel (VBAFE) to default e-mail address fields based on the user currently logged into the spreadsheet. The aim is to make it more convenient for users to use the spreadsheet and prevent them from having to manually input their e-mail address each time.

It is possible to default to any specific e-mail address by simply inputting the value for that e-mail address into the default value field, but this would require having one template per user. If it is possible to default the e-mail address value based on the currently logged in user, this would allow multiple users to use the same template and still have the convenience of not having to manually input their e-mail address each time.