update speech key

app.py

@@ -228,7 +228,7 @@ def Text2Sound(text):
 
 
 def get_azure_access_token():
-    azure_key = os.environ.get("OPENAI_API_KEY")
+    azure_key = os.environ.get("SPEECH_KEY")
     try:
         response = requests.post(
             "https://eastus.api.cognitive.microsoft.com/sts/v1.0/issuetoken",
@@ -240,7 +240,7 @@ def get_azure_access_token():
     except requests.exceptions.RequestException as e:
         print(f"Error: {e}")
         return None
-
+    print (response.text)
     return response.text