Invalid Steam Ticket fix

We redone the Steam login authentication system in a more robust way.

Yesterday we had 2 users who were unable to connect on Citywars. Their game was unable to obtain the Steam authentication token. After multiple tests it seems the problem was from the login system and not from an external source. We don't know exactly how or why the Steam authentication was failing under this particular circumstance but while debugging it we decided to remake the system with a new and improved version. This should help to catch more errors and help to diagnose the problem for future users.

If you have any other issue with login in the game please inform us on Discord :D https://discord.gg/citywars