diff --git a/copy_images.tf b/copy_images.tf
index 9198bac..e269303 100644
--- a/copy_images.tf
+++ b/copy_images.tf
@@ -56,8 +56,8 @@ module "images" {
   force_delete                = true
   lifecycle_policy_keep_count = 5
 
-  source_username = local.image_config.source_username
-  source_password = local.image_config.source_password
+  source_username = !local.image_config.source_username ? data.aws_ecr_authorization_token.token.user_name : ""
+  source_password = !local.image_config.source_password ? data.aws_ecr_authorization_token.token.password : ""
 
   destination_username = data.aws_ecr_authorization_token.token.user_name
   destination_password = data.aws_ecr_authorization_token.token.password