Username in invoice footer?

[tom@rocketcert.com]

Using shop/invoices/emails, is it possible to display the username in the invoice header or footer?

These are the options given:
In the letter headers and footers, you can use the following placeholders to display non-fixed text: {vm:pagenum}, {vm:pagecount}, {vm:vendorname}, {vm:vendorimage}, {vm:vendoraddress}, {vm:vendorlegalinfo}, {vm:vendordescription}, {vm:tos}.

Tom

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