authentication - How to auto log in after registration?

Question

Please help with code! Everything works good. but after registration, I want to auto login and start session.

            if (! empty($_POST["signup-password"])) {
                $hashedPassword = password_hash($_POST["signup-password"], PASSWORD_DEFAULT);
            }
            $query = 'INSERT INTO tbl_member (username, password, email) VALUES (?, ?, ?)';
            $paramType = 'sss';
            $paramValue = array(
                $_POST["username"],
                $hashedPassword,
                $_POST["email"]
            );
            $memberId = $this->ds->insert($query, $paramType, $paramValue);
            if (! empty($memberId)) {
                $response = array(
                    "status" => "success",
                    "message" => "You have registered successfully."
                );
            }
        }
        return $response;
    }

question from:https://stackoverflow.com/questions/65909420/how-to-auto-log-in-after-registration

Answer 1

Waitting for answers