following this discussion:
root@debian:/usr/games/minecraft# node ‘password tester.js’
testing etc_shadow
expected value: mc
returned value: false
testing posix
expected value: mc
returned value: true
testing pam
expected value: mc
returned value: true
So whatever etc_shadow is that is failing is (a) problem. But the other 2 auth methods are passing which should allow me to login to webui