Fix setting password

We were not acting on the error returning, and the sql sintax was wrong.

lib/database/users.go

@@ -74,8 +74,8 @@ func (db *pgDB) SetPassword(name string, pass string) error {
 	if err != nil {
 		return err
 	}
-	_, err = db.sql.Model(user{}).
-		Set("pass = ?, salt = ?", hash, salt).
+	_, err = db.sql.Model(&user{}).
+		Set("password = ?, salt = ?", hash, salt).
 		Where("username = ?", name).
 		Update()
 	return err