added checks for no UUID or name in user json files. IOException thrown from readUser if so.
added checks for no UUID or name in user json files. IOException thrown from readUser if so.

aikuma/aikuma,hleeldc/aikuma,aikuma/aikuma,hleeldc/aikuma,lisaslyis/aikuma,hleeldc/aikuma,aikuma/aikuma,lisaslyis/aikuma,lisaslyis/aikuma,hleeldc/aikuma,hleeldc/aikuma,lisaslyis/aikuma,aikuma/aikuma,lisaslyis/aikuma,aikuma/aikuma