Get Holidays - WorkingDays for a BookableResource that has a Default Work Template calendar?

Hi,
As the title says I am trying to find the Holidays - WorkingDays of a bookable resource that has a calendar set up to it, my question is what tables hold this information, I would like to update Sharepoint with the holidays set up for that user every time it changes (using power automate). Any ideas how can I get that info?