save refresh token in login route

internal/repos/refresh_tokens_repo/repo.go

@@ -0,0 +1,43 @@
+package refresh_tokens_repo
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type RefreshTokensRepo struct {
+	pool *pgxpool.Pool
+}
+
+func NewRefreshTokensRepo(pool *pgxpool.Pool) *RefreshTokensRepo {
+	return &RefreshTokensRepo{
+		pool: pool,
+	}
+}
+
+func (s *RefreshTokensRepo) AddRefreshToken(
+	ctx context.Context,
+	userId int,
+	refreshToken string,
+) error {
+	_, err := s.pool.Exec(
+		ctx,
+		`INSERT INTO refresh_tokens (user_id, refresh_token) VALUES ($1, $2)`,
+		userId,
+		refreshToken,
+	)
+	return err
+}
+
+func (s *RefreshTokensRepo) DeleteRefreshTokensByUserId(
+	ctx context.Context,
+	userId int,
+) error {
+	_, err := s.pool.Exec(
+		ctx,
+		`DELETE FROM refresh_tokens WHERE user_id = $1`,
+		userId,
+	)
+	return err
+}