[FEATURE] - Add Application Routes

[FedeLochbaum]

It's decided to use the following routes/endpoints:

• User
  • GET /users/:user_id, returns a User if exists.
  • POST /users/, returns a new created User if was created correctly (with games?).
  • PUT /users/:user_id, returns the updated User if exists.
  • DELETE /users/:user_id, returns something?
  • POST /users/login, same as create user!
• Game
  • GET /users/:user_id/games, returns current games for that user if exists.
  • GET /users/:user_id/games/:game_id, returns a game for that user if exists.
  • POST /users/:user_id/games, returns a new created game for that user if was created correctly.
  • PUT /users/:user_id/games/:game_id, returns the updated game of that user if exists.
  • DELETE /users/:user_id/games/:game_id, returns something?

We've created many routes for the application but we're not following any standard so we should set some and follow it. For example, deletes doesn't return anything.