diff --git a/app.py b/app.py
index 6488dfd..2c0e8ee 100644
--- a/app.py
+++ b/app.py
@@ -27,15 +27,15 @@ class WebPushService():
     """
     This class provides services for sending web push notifications.
     """
-    
+
     def __init__(self, app, config_name: str) -> None:
         """
         Initializes the WebPushService with the given application and configuration name.
-        
+
         Args:
         - app: The application instance where the service will be attached.
         - config_name (str): The name of the configuration to be used.
-        
+
         Attributes:
         - app: The application instance.
         - daily_notification_thread (threading.Thread): A thread to send daily notifications.
@@ -76,7 +76,7 @@ class WebPushService():
 
         Raises:
         - Exceptions raised by the key generation or database operations are caught and printed.
-        """        
+        """
         try:
             # Generating a private key using the elliptic curve SECP256R1
             private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
@@ -104,7 +104,7 @@ class WebPushService():
         except Exception as e:
             print(f"Error generating VAPID keys: {e}")
 
-            
+
     def _initialize(self) -> None:
         """
         Initializes the WebPushService by checking for the presence of VAPID keys in the database.
@@ -119,7 +119,7 @@ class WebPushService():
 
         # Checking if there are any VAPID keys in the database
         if not VAPIDKey.query.first():
-            
+
             # Generating and saving VAPID keys if none are found
             self._generate_and_save_vapid_keys()
 
@@ -152,7 +152,7 @@ class WebPushService():
             )
             time.sleep(1)
             return True
-        
+
         except WebPushException as ex:
             now = datetime.datetime.now().isoformat()
             endpoint = subscription_info['endpoint']
@@ -191,15 +191,15 @@ class WebPushService():
         - A context for the application is created to enable database operations.
         - The message content for the daily update is hardcoded in this method.
         """
-    
+
         while True:
-            
+
             now = datetime.datetime.now().isoformat()
             print(f"{now} - Starting to send subscriptions...", flush=True)
 
             # Creating a context for the application to enable database operations
             with self.app.app_context():
-                
+
                 # Retrieving all subscription data from the database
                 all_subscriptions = Subscription.query.all()
 
@@ -245,7 +245,7 @@ class WebPushService():
         - If the operation is successful, a JSON response with a success message is returned with a 200 status code.
         - If there's an error during the operation, a JSON response with the error message is returned with a 500 status code.
         """
-        
+
         # This default can be invoked thus: curl -X POST -H "Authorization: Basic YWRtaW46YWRtaW4=" localhost:3000/web-push/regenerate_vapid
         envPassword = os.getenv('ADMIN_PASSWORD', 'admin')
         auth = request.authorization
@@ -269,9 +269,9 @@ class WebPushService():
 
                 # Generating and saving new VAPID keys
                 self._generate_and_save_vapid_keys()
-                
+
             return jsonify(success=True, message="VAPID keys regenerated successfully"), 200
-        
+
         except Exception as e:
             return jsonify(error=f'Error regenerating VAPID keys: {str(e)}'), 500
 
@@ -296,7 +296,7 @@ class WebPushService():
 
         # Retrieving the VAPID key from the database
         key = VAPIDKey.query.first()
-        
+
         # Returning the public key in a JSON response
         return jsonify(vapidKey=key.public_key)
 
@@ -359,14 +359,14 @@ class WebPushService():
 
         # Creating a confirmation message for the push notification
         message = {"title": "Subscription Successful", "message": "Thank you for subscribing!"}
-        
+
         # Sending the confirmation push notification
         success = WebPushService._send_push_notification(subscription_info, message, vapid_key)
 
         # Returning the operation status
         return jsonify(success=success)
 
-    
+
     @staticmethod
     @app.route('/web-push/unsubscribe', methods=['POST'])
     def unsubscribe() -> Tuple[str, int]:
@@ -401,7 +401,7 @@ class WebPushService():
             db.session.delete(subscription)
             db.session.commit()
             return jsonify(success=True, message="Subscription deleted successfully")
-        
+
         # If the subscription is not found, return an error message
         else:
             return jsonify(success=False, error="Subscription not found"), 404