public function getCurrentUserId(){
        $username = $_SESSION['username'];
        $statement = self::$db->prepare("SELECT id FROM users where username = ?");
        $statement->bind_param("s", $username);
        $statement->execute();
}


// AccountsModel.php
public function login($username, $password){
        $statement = self::$db->prepare("SELECT Id, username, pass_hash FROM Users WHERE Username = ?");
        $statement->bind_param("s", $username);
        $statement->execute();
        $result = $statement->get_result()->fetch_assoc();
        if(password_verify($password, $result['pass_hash'])){
            return true;
        }

        return false;
}


//AccountsController.php
public function login(){
        if($this->isPost){
            $username = $_POST['username'];
            $password = $_POST['password'];
            $isLoggedIn = $this->db->login($username, $password);
            if($isLoggedIn){
                $_SESSION['username'] = $username;
                $this->addInfoMessage("Successfully login.");
                return $this->redirect("home");
            } else {
                $this->addErrorMessage("Login error.");
            }
        }

        $this->renderView(__FUNCTION__);
}