Tauri-demo: implement login attempt listener

app.ts

    #handleLoginAttempt = (e: Event) => {
        const { email, password } = (<CustomEvent>e).detail;
        this.#authComponent?.login(email, password);
    }
    #setViewAccordingToUserStatus = () => {
        
        if (!this.#authComponent!.isLoggedIn || this.#authComponent!.isLoggedIn?.() === false) {
            this.shadowRoot!.innerHTML = `<yag-login></yag-login>`;
            const loginElement = this.shadowRoot!.querySelector('yag-login') as HTMLElement;
            loginElement.addEventListener('login-attempt', this.#handleLoginAttempt);
        } else {
            const loginElement = this.shadowRoot!.querySelector('yag-login') as HTMLElement;
            loginElement?.removeEventListener('login-attempt', this.#handleLoginAttempt);
            this.shadowRoot!.innerHTML = `<yag-greeter></yag-greeter>`;
        }
    }