Update app.py

app.py

@@ -6,6 +6,14 @@ import PyPDF2
 import docx2txt
 import huggingface_hub
 
+import os
+os.environ['KERAS_BACKEND'] = 'tensorflow'
+os.environ['HF_USERNAME'] = 'Grey01'
+
+import huggingface_hub
+if 'HF_USERNAME' not in os.environ or 'HF_TOKEN' not in os.environ:
+    huggingface_hub.notebook_login()
+
 hf_username = huggingface_hub.whoami()['name']
 hf_url = f'hf://{hf_username}/bart_billsum'