Samba question

[reggler]

hi There,

I configured a samba sefver a while ago but can't remember the credentials... how can i figure them out?
My [global] looks as such:

[global]
  ; General server settings
  netbios name = reg-desktop
  server string =
  workgroup = TUXNET
  announce version = 5.0
  socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192

  passdb backend = tdbsam
  security = user
  null passwords = true
  username map = /etc/samba/smbusers
  name resolve order = hosts wins bcast

  wins support = yes

  printing = CUPS
  printcap name = CUPS

  syslog = 1
  syslog only = yes