throw error if bin_file not specified

app.py

@@ -54,10 +54,14 @@ def get_model(model_name):
     return model #model,embedding_dim,transform,metadata
 
 def download_bin(model):
+    bin_file = ""
     if model == "vc1-large":
         bin_file = 'vc1_vitl.pth'
     elif model == "vc1-base":
         bin_file = 'vc1_vitb.pth'
+    else:
+        raise NameError("model not found: " + model)
+    
     bin_path = os.path.join(MODEL_DIR,bin_file)
     if not os.path.isfile(bin_path):
         model_bin = hf_hub_download(repo_id=REPO_ID, filename='pytorch_model.bin',local_dir=MODEL_DIR,local_dir_use_symlinks=True,token=HF_TOKEN)