$file = File::factory([
'parent' => kirby()->user(),
'filename' => $filename,
]);
if ($file) {
$file->update(['template' => 'selfie-image']);
}
Theoretically, you wouldn’t need the factory, but could fetch the file via the user object
$file = kirby()->user()->file();
if ($file) {
$file->update(['template' => 'selfie-image']);
}