Feat: finish login and add test

implements/bunDatabase.go

@@ -57,19 +57,18 @@ func (self *BunDatabase) UpdateRefreshToken(
 		return models.Session{}, err
 	}
 
-	err = self.db.NewUpdate().
+	_, err = self.db.NewUpdate().
 		Model((*models.Session)(nil)).
 		Set("refresh_token = ?", ret.RefreshToken).
-		Where("user_id = ?", ret.UserId).
-		Returning("*").
-		Scan(ctx, &ret)
+		Where("user_id = ?", userId).
+		Exec(ctx)
 	if err != nil {
 		return models.Session{}, err
 	}
 	return ret, nil
 }
 
-func (self *BunDatabase) UpdateLoginToken(
+func (self *BunDatabase) UpsertLoginToken(
 	ctx context.Context,
 	userId string,
 ) (string, error) {
@@ -78,10 +77,14 @@ func (self *BunDatabase) UpdateLoginToken(
 		return "", err
 	}
 
-	_, err = self.db.NewUpdate().
-		Model((*models.Session)(nil)).
-		Set("login_token = ?", token).
-		Where("user_id = ?", userId).
+	session := models.Session{
+		UserId:     userId,
+		LoginToken: token,
+	}
+	_, err = self.db.NewInsert().
+		Model(&session).
+		On("CONFLICT (user_id) DO UPDATE").
+		Set("login_token = EXCLUDED.login_token").
 		Exec(ctx)
 	if err != nil {
 		return "", err