Admin API added userDataRetention field to DataRetentionSettings (v1alpha/v1beta)

The Google Analytics Admin API gained a userDataRetention field so developers can read or change a property's user-level data retention separately from event data retention.

User data retention (cookies, User-IDs, advertising identifiers) can be set to 2 or 14 months for standard and 360 properties; Google-signals data is retained at most 26 months regardless of setting.