Create a UML class diagram of your system (detail level reflecting state of implementation/planning) for the following application described below:

Features:

1. The user is able to create an account and save their information. 2. The user is able to log into their account. 3. The user is able to start a new session / game. 4. The user is able to see their scores while playing the game.

5. The user is able to review their current High Score. 6. The user is able to skip a question which he finds difficult. 7. The user is able to get a hint for a question which he finds difficult.

Include database and everything!