Creating Credit via Integromat

Has anyone setup an automated way to create credits via integromat?

I have an airtable in which I create gift certificate with a bar-code for a specific amount for clients when purchased. I’m trying to figure out how to automate creating the credits within Invoice Ninja when a new certificate is activated and/or apply the certificate amount to their active invoice. I can find how to create a new client, invoice, and payment via the integration with integromat but am unable to locate a way to create credits. Has anyone done this?