Update backend.py

backend.py

@@ -1,5 +1,10 @@
 from transformers import pipeline
 from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
+import os
+from huggingface_hub import login
+
+access_token=os.getenv('hf_gated_model_access_token')
+login(token=access_token)
 
 def load_model():
     tokenizer = AutoTokenizer.from_pretrained("google/gemma-3-270m-it")