Make code a bit more defensive and add som logging

app/notifications/utils.py

@@ -1,8 +1,18 @@
+from flask import current_app
 import requests
 
 
 def confirm_subscription(confirmation_request):
-    url = confirmation_request['SubscribeURL']
+    url = confirmation_request.get('SubscribeURL')
+    if not url:
+        current_app.logger.warning("SubscribeURL does not exist or empty")
+        return
+
     response = requests.get(url)
-    response.raise_for_status()
+    try:
+        response.raise_for_status()
+    except Exception as e:
+        current_app.logger.warning("Response: {}".format(response.text))
+        raise e
+
     return confirmation_request['TopicArn']