func validUsername(name string) bool {
	if len(name) > 32 {
		return false
	} else if strings.Contains(name, ":") {
		return false
	}
	return true
}
validUserName asks: Is this a valid POSIX+Linux username?
package checks
import (
	"strconv"
	"strings"
	"github.com/CiscoCloud/distributive/chkutil"
	"github.com/CiscoCloud/distributive/errutil"
	"github.com/CiscoCloud/distributive/tabular"
	gossuser "github.com/aelsabbahy/goss/system"
	gossutil "github.com/aelsabbahy/goss/util"
	libcontaineruser "github.com/opencontainers/runc/libcontainer/user"
)
func validGroupName(name string) bool {
	return !strings.Contains(name, ":")
}