Resource not found when making API call to text-to-speed service

Hi FU SHIJIE,**
**Thank you for reaching out! I understand you're working on getting Text-to-Speech set up, and I'm here to help make this process as smooth as possible for you.

Azure Text-to-Speech works in two simple steps, and I'll walk you through each one:
Step 1: Get Your Authorization Token

Method: POST

URL: https://YOUR_REGION.api.cognitive.microsoft.com/sts/v1.0/issuetoken

Example: https://eastus.api.cognitive.microsoft.com/sts/v1.0/issuetoken

Headers:

Ocp-Apim-Subscription-Key: YOUR_AZURE_SPEECH_KEY 
Content-Length: 0

Body: Leave this empty.

Once you click Send, you'll receive a long token string in the response body. This is your Bearer token - just copy it for the next step.

Step 2: Create Your Text-to-Speech Request

Method**:** POST

URL: https://YOUR_REGION.tts.speech.microsoft.com/cognitiveservices/v1

Example: https://eastus.tts.speech.microsoft.com/cognitiveservices/v1

Headers:

Authorization: Bearer <speech_token> 
Content-Type: application/ssml+xml 
X-Microsoft-OutputFormat: riff-16khz-16bit-mono-pcm 
User-Agent: Bruno-TTS 

Body → Select "Raw" and paste this SSML:

<speak version="1.0" xml:lang="en-US">
  <voice name="en-US-JennyNeural">
    Hello! This audio was generated using Azure Text to Speech and Bruno.
  </voice>
</speak>

After clicking Send, you'll receive your audio file in the response!:

Please accept this as an answer.
Thank you for using Microsoft Q&A Portal, and happy coding!😊