Update flask_app.py

Model/flask_app.py

@@ -18,6 +18,7 @@
 
 @auth.verify_password
 def verify_password(username, password):
+    """ Verify password for API Docs"""
     if username in users and check_password_hash(users.get(username), password):
         return username
     return None
@@ -51,6 +52,7 @@ def verify_password(username, password):
 
 @ns.route('/')
 class HealthCheck(Resource):
+    """Server health check."""
     @api.doc('health_check')
     def get(self):
         """Server health check."""
@@ -61,6 +63,7 @@ def get(self):
 
 @ns.route('/chat')
 class ChatBot(Resource):
+    """retrieve and rank api entry point"""
     @api.doc('chat_bot')
     @api.expect(model)
     def post(self):