Further, without _type and or _before specification, this endpoint defaults to deleting all the FHIR resources (all types) for the given 1up user for a particular FHIR version (e.g., R4). If _type parameter is used, only specified resource(s) by resource type will be purged. If _before parameter is used, and the
meta.lastUpdated date of any given resource is strictly less than (<) the date passed into the _before filter, then those specific resource(s) will be purged (i.e. if the date 2022-05-10 is passed into the _before filter, all resources with a
meta.lastUpdated date before but not equal to 2022-05-10 will be purged). In either case, purge will NOT delete the 1up user itself, which will continue to exist, just without the deleted FHIR resources after the purge.