How can I obtain the `voice_id` in the user case `Create a video with your own photo`?

curl -XPOST <https://api.heygen.com/v1/video.generate> -H 'x-api-key:<your api key>' -H 'Content-Type: application/json'  
-d '{  
  "background": "#ffffff",  
  "clips": [  
    {  
      "talking_photo_id": "<your talking photo id>",  
      "input_text": "Welcome to HeyGen API",  
      "scale": 1,  
      "voice_id": "1bd001e7e50f421d891986aad5158bc8"  
    }  
  ],  
  "ratio": "16:9",  
  "test": true,  
  "version": "v1alpha"  
}'

This is the request example but I don't know how to obtain the voice_id.

Is there a matched API for getting the voice_id?