Set VPG SLA Test Alerts to ‘NONE’

I would like to set the VPG Test Alerts to ‘NONE’ within the Replication/SLA section of the VPG config. The current setting is 6 months for an alert to be triggered.
This is a simple straight forward change via the GUI.
Does anyone have a sample script solution for doing this as a batch rather than manually configuring each VPG?
Via the REST API or powershell could work.
Many Thanks