Update app.py

app.py

@@ -49,8 +49,10 @@ def generate_filename(prompt, file_type):
 
 def transcribe_audio(openai_key, file_path, model):
     OPENAI_API_URL = "https://api.openai.com/v1/audio/transcriptions"
+    key = os.getenv('OPENAI_KEY')
+
     headers = {
-        "Authorization": f"Bearer {openai_key}",
+        "Authorization": f"Bearer {key}",
     }
     with open(file_path, 'rb') as f:
         data = {'file': f}