Update app.py

app.py

@@ -4,8 +4,8 @@ from anthropic import Anthropic
 from pypdf import PdfReader
 
 # Set up username and password
-username = get.env("username")
-password = get.env("password")
+username = os.getenv('username')
+password = os.getenv('password')
 
 # Add the path to your desired knowledge base
 reference_document = "The Learning Cycle.pdf"