improve Inventory error messages when device not in inventory

internal/resource_org_inventory/sdk_to_terraform.go

@@ -2,6 +2,7 @@ package resource_org_inventory
 
 import (
 	"context"
+	"fmt"
 	"strings"
 
 	"github.com/tmunzer/mistapi-go/mistapi/models"
@@ -127,6 +128,16 @@ func SdkToTerraform(ctx context.Context, orgId string, data []models.Inventory,
 			} else if dev_from_mist, ok := devices_tmp[mac]; ok {
 				checkVcSiteId(&dev_from_mist, vcmac_to_site)
 				devices_out = append(devices_out, dev_from_mist)
+			} else if magic != "" {
+				diags.AddError(
+					"Device not in the Org Inventory",
+					fmt.Sprintf("Device with Claim Code %s is not in the Org Inventory", magic),
+				)
+			} else {
+				diags.AddError(
+					"Device not in the Org Inventory",
+					fmt.Sprintf("Device with MAC Address %s is not in the Org Inventory", mac),
+				)
 			}
 		}
 	}