Update app.py

app.py

@@ -59,6 +59,7 @@ def calculate_xp(level):
 @bot.command(name='add_exp_hub')
 async def add_exp_hub(ctx):
     try:
+        guild = bot.get_guild(879548962464493619)
         role = discord.utils.get(guild.roles, id=900063512829755413)
         if role:
             # Get members with the specified role