Design Input Form (Optional): Create input elements on a page for users to enter contact details (First Name, Last Name, Email, Phone, etc.). Create Workflow:
Trigger a workflow (e.g., "When Button 'Create VCF' is clicked").
Add the action: Plugins -> Generate VCF Card.
Map the input fields in the action properties panel to your page's input elements (e.g., First Name = Input First Name's value). For photoBase64, you'd typically map this to the value (base64) state of a Picture Uploader element after a file is uploaded.
Crucially: Add a next step to handle the Result of step X's (Generate VCF Card) VCF File.