Update app.py

app.py

@@ -8,7 +8,7 @@ from pdfminer.high_level import extract_text
 
 openai.api_key = os.environ['OPENAI_API_KEY']
 
-user_db = {os.environ['username']: os.environ['password']}
+user_db = {os.environ['username1']: os.environ['password1'], os.environ['username2']: os.environ['password2']}
 
 messages = [{"role": "system", "content": 'You are a helpful assistant.'}]