Update app.py

app.py

@@ -11,7 +11,7 @@ signs = [
 
 def get_trending_news():
     """Fetch and return trending news headlines."""
-    url = "http://newsapi.org/v2/top-headlines?country=us&apiKey=a37ab6843a934a16aea7f8bbeb83cd96"
+    url = "http://newsapi.org/v2/top-headlines?country=us&apiKey=" + NewsAppToken
     try:
         page = requests.get(url).json()
         articles = page["articles"]