Update app.py

app.py

@@ -10,7 +10,7 @@ from firebase_admin import db, credentials
 import datetime
 import uuid
 import random
-global session_id = str(uuid.uuid4())
+session_id = str(uuid.uuid4())
 def select_random_name():
     names = ['Clara', 'Lily']
     return random.choice(names)