Data Access Service

Data Access Service is a program designed to manage users with different permission levels and interact with various databases.

Features

Create Users
- Users can be created using the following classes:
  - User: Represents a regular user.
  - Moderator: Represents a moderator.
  - Admin: Represents an administrator.
Data Access Objects(DAO)
- You can connect to various Databases through these classes:
  - PostgeDAO: Connect to PostgreSQL.
  - MysqlDAO: Connect to MySQL.
  - CommonDAO: Connect to both Databases.
Database Interaction
- After creating a user instance and DAO, you can interact with the database using the following methods:
  - dao_instance.create(user_instance): Add user data to the database.
  - dao_instance.delete(user_instance): Remove user data from the database.
  - dao_instance.update(user_instance): Update existing user data in the database.