public System.Net.Http.HttpResponseMessage GroupImport([FromBody] List <Rock.Slingshot.Model.GroupImport> groupImports, string foreignSystemKey)
{
var responseText = InitiateBulkImporter().BulkGroupImport(groupImports, foreignSystemKey);
AttributeValueService.UpdateAllValueAsDateTimeFromTextValue();
return(ControllerContext.Request.CreateResponse <string>(HttpStatusCode.Created, responseText));
}