refactor(bot): use _fill_owners in Bot.is_owner instead of reimpl…

…ementing logic

disnake/ext/commands/common_bot_base.py

@@ -80,9 +80,7 @@ async def _fill_owners(self) -> None:
         if self.owner_id or self.owner_ids:
             return
 
-        await self.wait_until_first_connect()  # type: ignore
-
-        app = await self.application_info()  # type: ignore
+        app: disnake.AppInfo = await self.application_info()  # type: ignore
         if app.team:
             self.owners = set(app.team.members)
             self.owner_ids = {m.id for m in app.team.members}
@@ -111,11 +109,13 @@ async def close(self) -> None:
 
     @disnake.utils.copy_doc(disnake.Client.login)
     async def login(self, token: str) -> None:
-        self.loop.create_task(self._fill_owners())  # type: ignore
+        await super().login(token=token)  # type: ignore
 
         if self.reload:
             self.loop.create_task(self._watchdog())  # type: ignore
-        await super().login(token=token)  # type: ignore
+
+        # prefetch
+        self.loop.create_task(self._fill_owners())  # type: ignore
 
     async def is_owner(self, user: Union[disnake.User, disnake.Member]) -> bool:
         """|coro|
@@ -140,20 +140,13 @@ async def is_owner(self, user: Union[disnake.User, disnake.Member]) -> bool:
         :class:`bool`
             Whether the user is the owner.
         """
+        if not self.owner_id and not self.owner_ids:
+            await self._fill_owners()
+
         if self.owner_id:
             return user.id == self.owner_id
-        elif self.owner_ids:
-            return user.id in self.owner_ids
         else:
-            app = await self.application_info()  # type: ignore
-            if app.team:
-                self.owners = set(app.team.members)
-                self.owner_ids = ids = {m.id for m in app.team.members}
-                return user.id in ids
-            else:
-                self.owner = app.owner
-                self.owner_id = owner_id = app.owner.id
-                return user.id == owner_id
+            return user.id in self.owner_ids
 
     def add_cog(self, cog: Cog, *, override: bool = False) -> None:
         """Adds a "cog" to the bot.