Host Lobby Code Refresh Bug

[sagars2004]

• Encountered a bug where where if the host of a session generates a 4-digit code and then refreshes the page, a new lobby code is generated even if the host has already created a pervious session in the lobby, so their session data is lost

• Have not tested for sessions with no participants and sessions with a host joined. Will need to update this fix in a patch release

• Should be a quick fix as the MongoDB server only stores a query for the session data, including the lobby code, when a session is actively created and participants join, so refreshing doesn't add a new session each time and does not overwrite