Revert "Kick current player instead of preventing login"

This reverts commit 13fc7d82fd525c2a5ec22fe21b1419e121f9866a.
Revert "Fix multiple players being able to log in. Fixes #150"

This reverts commit c672f45b72a6fae77a47c5ae52842230327aab4d.
Revert "Follow formating standards"

This reverts commit f982dd272fbf1116f0cde4c614acaa801f16c3db.
Revert "Added Gravity"

This reverts commit 83db6a1ea09db3d2567586224a1010878648e518.