Use NewLDAP to instanciate LDAP backend

auth/auth.go

@@ -15,14 +15,19 @@ type Options struct {
 // Backend to log user in
 type Backend interface {
 	Login(string, string) (bool, error)
+	Close()
 }
 
 // New initialize authentification backend
 func New(cfg *Options) (Backend, error) {
 	var backend Backend
+	var err error
 
 	if cfg.Backend == "LDAP" {
-		backend = ldap.LDAP{Cfg: cfg.LDAP}
+		backend, err = ldap.NewLDAP(&cfg.LDAP)
+		if err != nil {
+			return nil, err
+		}
 	} else {
 		// Package is misconfigured
 		return nil, errors.New("Authentification backend not found")