PhaySometh/KhodKquiz

AI Summary: Implement Google OAuth 2.0 authentication for user sign-up and login in a full-stack quiz application. This involves adding a "Continue with Google" button to the frontend, creating a backend endpoint to verify Google ID tokens, and handling both new and returning user scenarios by creating or retrieving user data from a PostgreSQL database. The database schema needs to be updated to accommodate Google user IDs.

AI Summary: Design the database schema for the KhodKquiz application, including tables for users, categories, questions, quizzes, quiz answers, and badges. Implement the database connection to the Neon database in both the frontend and backend codebases. Populate the database with initial data (if needed).