Support for TGW Attachment Peering resources

Support for removing TGW Attachment Peering resources, as only VPC attachments
where supported before.

resources/ec2-tgw-attachments.go

@@ -52,6 +52,21 @@ func (e *EC2TGWAttachment) Remove() error {
  // as part of TGW to delete VPN attachments.
  return fmt.Errorf("VPN attachment")
  }
+
+ // Execute different API calls depending on the resource type.
+ if *e.tgwa.ResourceType == "peering" {
+ params := &ec2.DeleteTransitGatewayPeeringAttachmentInput{
+ TransitGatewayAttachmentId: e.tgwa.TransitGatewayAttachmentId,
+ }
+
+ _, err := e.svc.DeleteTransitGatewayPeeringAttachment(params)
+ if err != nil {
+ return err
+ }
+
+ return nil
+ }
+
  params := &ec2.DeleteTransitGatewayVpcAttachmentInput{
  TransitGatewayAttachmentId: e.tgwa.TransitGatewayAttachmentId,
  }