How can I use ElevenLabs for real-time voice cloning in my app?

<!-- BEGIN COPY / PASTE -->
    import requests

    def generate_speech(api_key, text, voice_id):
        url = "https://api.elevenlabs.io/v1/text-to-speech"
        headers = {
            "Authorization": f"Bearer {api_key}",
            "Content-Type": "application/json"
        }
        data = {
            "text": text,
            "voice_id": voice_id,
            "real_time": True
        }
        response = requests.post(url, headers=headers, json=data)
        return response.content

    # Usage
    api_key = "your_api_key_here"
    voice_id = "cloned_voice_id"
    text = "Hello, this is a real-time voice synthesis example."
    audio_content = generate_speech(api_key, text, voice_id)
    <!-- END COPY / PASTE -->