#autoload

if [[ -prefix 1 *@ ]]; then

  _tags any:user-at hosts || return 1

  local user=${PREFIX/@}

  compset -P 1 '*@'
  _description expl "hostnames for $user"
  _combination accounts_users_hosts users="$user" hosts "$expl[@]" "$@"
else
  _tags any users || return 1

  _description expl "usernames"
  _combination accounts_users_hosts users -S@ -q "$expl[@]" "$@"
fi