Add auth token

app.py

@@ -20,6 +20,7 @@ Image similarity-based retrieval tool using:
 - [Faiss](https://github.com/facebookresearch/faiss) and [autofaiss](https://github.com/criteo/autofaiss) for indexing
 """
 
+HF_TOKEN = os.environ["HF_TOKEN"]
 CONV_MODEL_REPO = "SmilingWolf/wd-v1-4-convnext-tagger-v2"
 CONV_MODEL_REVISION = "v2.0"
 CONV_FEXT_LAYER = "predictions_norm"
@@ -42,7 +43,11 @@ def download_model(model_repo, model_revision):
     model_file_paths = []
     for elem in model_files:
         model_file_paths.append(
-            Path(hf_hub_download(model_repo, revision=model_revision, **elem))
+            Path(
+                hf_hub_download(
+                    model_repo, revision=model_revision, use_auth_token=HF_TOKEN, **elem
+                )
+            )
         )
 
     model_path = model_file_paths[0].parents[0]