Update app.py

app.py

@@ -10,7 +10,7 @@ HF = os.getenv("HF_SECRET")
 recipe_generator = pipeline("text2text-generation", model="flax-community/t5-recipe-generation")
 
 API_URL = "https://api-inference.huggingface.co/models/stabilityai/stable-diffusion-xl-base-1.0"
-headers = {'Authorization': f'Bearer '}
+headers = {'Authorization': f'Bearer {HF}'}
 
 def query(payload):
     response = requests.post(API_URL, headers=headers, json=payload)