(refactor): Implement robust logging and database error handling

Introduced logging for user operations
Added database rollback on user creation failure
Enhanced exception handling and error reporting

services/UserService/user.py

@@ -1,30 +1,42 @@
 from models.User.user import User, db
+import logging
+
+logger = logging.getLogger(__name__)
+
 
 class UserService:
     def create_user(self, username, password):
         if not username or not password:
             raise ValueError("Username and password are required")
-        
+
         if len(username) < 3 or len(password) < 8:
-            raise ValueError("Username must be at least 3 characters and password must be at least 8 characters.")
-        
+            raise ValueError(
+                "Username must be at least 3 characters and password must be at least 8 characters."
+            )
+
         existing_user = User.query.filter_by(username=username).first()
         if existing_user:
             raise ValueError("User already exists")
-        
+
         new_user = User(username=username, password=password)
         db.session.add(new_user)
-        db.session.commit()
+        try:
+            db.session.commit()
+        except Exception as e:
+            db.session.rollback()
+            logger.error(f"Error creating user: {e}")
+            raise ValueError("Could not create user") from e
         return new_user
 
     def verify_user(self, username, password):
         user = User.query.filter_by(username=username).first()
         if not user:
-            print(f"User not found: {username}")
+            logger.warning(f"User not found: {username}")
             raise ValueError("Invalid username or password")
-        
+
         if not user.check_password(password):
+            logger.warning(f"Invalid password for user: {username}")
             raise ValueError("Invalid username or password")
-        
-        print(f"User verified: {username}")
+
+        logger.info(f"User verified: {username}")
         return user