feat: update callback handler and repository for user

backend/internal/repositories/auth_repository.go

@@ -5,6 +5,7 @@ import (
 	"database/sql"
 
 	"gitea.d3m0k1d.ru/d3m0k1d/d3m0k1d.ru/backend/internal/logger"
+	"gitea.d3m0k1d.ru/d3m0k1d/d3m0k1d.ru/backend/internal/storage"
 )
 
 type authRepository struct {
@@ -18,5 +19,23 @@ func NewAuthRepository(db *sql.DB) AuthRepository {
 		logger: logger.New(false),
 	}
 }
-func (a *authRepository) Test(ctx context.Context) {
+
+func (a *authRepository) Register(ctx context.Context, user storage.UserReg) error {
+	_, err := a.db.Exec(
+		"INSERT INTO users(email, github_id, github_login, avatar_url) VALUES(?, ?, ?, ?)",
+	)
+	if err != nil {
+		a.logger.Error("error scan: " + err.Error())
+		return err
+	}
+	a.logger.Info("User registered:", "email", user.Email)
+	return nil
+}
+
+func (a *authRepository) IsRegistered(ctx context.Context, github_id int) (bool, error) {
+	row := a.db.QueryRow("SELECT id FROM users WHERE github_id = ?", github_id)
+	if row != nil {
+		return true, nil
+	}
+	return false, nil
 }