ADDUSER <channel> <username> <level> [OP|VOICE|NONE]
{150} Adds a user to a channel's access list
  <channel> : Channel to add user to
  <username>: Username to add to channel
  <level>   : Level of access to give user (see MODUSER for more info)
  [OP|VOICE|NONE]: Optional, mode to issue on join (see also MODAUTO)
