How do I stop a Wix Automation for a single contact? Manually or programmatically?

Question:
How do I stop a Wix Automation for a single contact?

Product:
Wix Automation

What are you trying to achieve:
A contact enters into a Wix Automation. It could be from a form or by moving a card in a workflow. The automation is an email nurture stream. The contact makes a purchase and the emails in the nurture stream are no longer relevant. I would like to find a way to stop future nurture emails for only this one contact.

What have you already tried:
I don’t know where to start. I know how to stop an automation from firing for all situations.