Populate "payment_method" when Importing Payslips to ePayslips

In the Import Payslips POST request in the ePayslips API, there is the option to include "payment_method". This is currently coming across as blank. Could we start to populate this with the "method" from https://app.staffology.co.uk/api/docs/models/payoptions

This will then be used to drive Dataplan billing for Client account customers, and to display on the PDF Payslips.