TODO: fix create/invite conflict on email

Create new session

POST /V1/create

{
  "gameId": {GAME_ID},
  "users": ["[email protected]", "[email protected]"]
}

Invite other users by mail

PUT /V1/invite:{game_id}

{
  "email": "[email protected]",
  "email": "[email protected]"
}

Joi session

PUT /V1/join:{game_id}

Update session

PUT /V1/update

{
  "field-to-update": "value"
}

Each time a session is updated a server event is emitted to all the sokets connected:

io.to((<any>Session)['token']).emit('session-update', Session)

Join session from the client:

socket.on('connect', function() {
   socket.emit('join', { token: 'TOKEN_FROM_SESSION' });
});  

Event listener for session changes:

socket.on('session-update', function (data) { 
  // Update frontend..
});