Use set for is_owner

Author: Taaku18

bot.py

@@ -130,7 +130,8 @@ def _load_extensions(self):
             self.load_extension(cog)
 
     async def is_owner(self, user):
-        allowed = [int(x) for x in str(self.config.get('owners', '0')).split(',')]
+        allowed = {int(x) for x in
+                   str(self.config.get('owners', '0')).split(',')}
         return user.id in allowed
 
     async def logout(self):

core/decorators.py

@@ -39,8 +39,8 @@ async def wrapper(self, ctx: commands.Context, *args, **kwargs):
 
 def owner_only():
     async def predicate(ctx: commands.Context) -> bool:
-        allowed = [int(x) for x in
-                   str(ctx.bot.config.get('owners', '0')).split(',')]
+        allowed = {int(x) for x in
+                   str(ctx.bot.config.get('owners', '0')).split(',')}
         return ctx.author.id in allowed
 
     return commands.check(predicate)