func strToAuther(verifier string) (string, Auther, error) {
st := strings.SplitN(verifier, "$", 3)
if len(st) != 3 || st[0] != "" {
func strToAuther(verifier string) (string, Auther, error) {
st := strings.SplitN(verifier, "$", 3)
if len(st) != 3 || st[0] != "" {