Remove all use of player.getUniqueId(). This would cause problems with
invalid uuids when server was in offline mode.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Add an option to disable caching.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Add proper warnings and remove debug messages.

Signed-off-by: Staartvin <mijnleraar@msn.com>
We also don't need that message.

Signed-off-by: Staartvin <mijnleraar@msn.com>