The IDs of the user's groups. Find group IDs using GET /workspaces/{workspaceId}/groups or the Copy group ID button in Settings > People > Groups. Requires a global admin and the user groups and expanded public API features. On update, replaces memberships; omit to preserve them or provide an empty array to remove all memberships. SCIM-managed memberships cannot be added or removed. New users without group assignments receive the default group, if configured.