"active_entitlements" not included in response from V2 API Get a list of customers

I’m using the RevenueCat V2 API to retrieve customer information with the https://api.revenuecat.com/v2/projects/{project_id}/customers . According to the documentation, the response should include the active_entitlements field, but it is not present in the data I receive.   

only Response
{
      experiment: null,
      first_seen_at: 123,
      id: 'XXXXX',
      last_seen_at: 123,
      object: 'customer',
      project_id: 'XXX'
}