update README

models/group.go

@@ -26,6 +26,19 @@ func GroupGetByName(groupname string) (Group, error) {
 	return g, nil
 }
 
+// GroupGetById queries the database for the specified group name
+func GroupGetById(groupId int) (Group, error) {
+	var g Group
+
+	// Query database for matching group object
+	err := db.QueryRowx("SELECT * FROM groups WHERE GroupId=?", groupId).StructScan(&g)
+	if err != nil {
+		return g, errors.New("group not found")
+	}
+
+	return g, nil
+}
+
 // GroupGetByName queries the database for a group with the  specified LDAP distinguishedName
 func GroupGetByLdapDn(ldapDn string) (Group, error) {
 	var g Group