user/gshadow.go
func NewGShadow(username string, members ...string) *GShadow {
	return &GShadow{
		Name:     username,
		UserList: members,
	}
}
func NewGShadow(username string, members ...string) *GShadow {
	return &GShadow{
		Name:     username,
		UserList: members,
	}
}
// NewGShadow returns a new GShadow.