Bug: knowing a game_id allows you to join (and vote in) games already started

[rewtd]

Describe the bug
When a game has already been started all the cards are dealt to players, however a player can still join that already started game and is then able to see and vote on cards as they are played.

To Reproduce
Steps to reproduce the behavior:

1. Create a game and and add three players to the game before starting it.
2. Now go to the join game endpoint for that newly started game.
3. Join as a new player, who is assigned no cards, but is able to watch the game in real time and vote on cards played.

Expected behavior
Players should not be able to join a game already in progress.

[Mysterio-17]

Hey @rewtd , Can i work on this issue

[InFiNiTy0639]

Hi @rewtd, could you please assign this to me?

[rewtd]

@InFiNiTy0639 looks like @Mysterio-17 jumped on this first, but there are other open issues that need looking at.

[sarthak-singh08]

@rewtd sir please assign this to me