Update tts.py

tts.py

@@ -1,8 +1,26 @@
 import time
+import os
+import json
+import tempfile
 
 import google.cloud.texttospeech as tts
 import simpleaudio as sa
 
+# process of getting credentials
+def get_credentials():
+    creds_json_str = os.getenv("GOOGLE")
+    if creds_json_str is None:
+        raise ValueError("GOOGLE_APPLICATION_CREDENTIALS_JSON not found in environment")
+
+    # create a temporary file
+    with tempfile.NamedTemporaryFile(mode="w+", delete=False, suffix=".json") as temp:
+        temp.write(creds_json_str) # write in json format
+        temp_filename = temp.name 
+
+    return temp_filename
+    
+os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = get_credentials()
+
 class TextToSpeech:
     def __init__(self):
         self.voice_params = tts.VoiceSelectionParams(