Update app.py

app.py

@@ -56,7 +56,7 @@ def predict_sentiment(text):
     return scaled_score
 
 def fetch_articles(ticker):
-    POLYGON_API_KEY = os.get_env('poly_api')
+    POLYGON_API_KEY = os.getenv('poly_api')
     url = f"https://api.polygon.io/v2/reference/news?ticker={ticker}&limit=1&apiKey={POLYGON_API_KEY}"
     try:
         response = requests.get(url)