Update app.py

app.py

@@ -9,7 +9,7 @@ st.sidebar.subheader("By KVI Kontent")
 st.sidebar.write("Choose model and enter prompt")
 api_key = os.environ['api_key']
 API_URL_DALLE = "https://api-inference.huggingface.co/models/openskyml/dalle-3-xl"
-headers = {"Authorization": api_key}
+headers = {"Authorization": f"Bearer {api_key}"}
 
 model = st.sidebar.selectbox("Choose Model", ("prodia", "pollinations", "Dall-e 3"))