Returns the current target groups.

Caution: Target groups were deprecated in Tenable Vulnerability Management on February 4th, 2022. Tenable recommends that customers use tags instead to group and scan assets. Please update any existing integrations that your organization has. If you want to automatically migrate your target groups to tags via the API and pyTenable, see Migrate Target Groups to Tags. For more information about tags, see Tags in the Tenable Vulnerability Management User Guide.