There should be `Groups` field in https://github.com/gophercloud/gophercloud/blob/master/openstack/blockstorage/extensions/quotasets/results.go#L10 Docs: [API reference](https://docs.openstack.org/api-ref/block-storage/v3/index.html?expanded=show-quotas-for-a-project-detail#show-quotas-for-a-project) For [terraform-provider-openstack#806](https://github.com/terraform-providers/terraform-provider-openstack/pull/806), [terraform-provider-openstack#657](https://github.com/terraform-providers/terraform-provider-openstack/issues/657)