Update app.py

app.py

@@ -51,8 +51,8 @@ def generate_txt2img(current_model, prompt, is_negative=False, image_style="None
         API_URL = "https://api-inference.huggingface.co/models/playgroundai/playground-v2-1024px-aesthetic"  
 
         
-    api_key = os.getenv("Imagrating")
-    headers = {"Authorization":  "f'Bearer {api_key}"}
+    API_KEY = os.environ.get("API_KEY")
+    headers = {"Authorization": f"Bearer {API_KEY}"}
 
 
     if image_style == "None style":