LabCleaningBot: add assert_is_base_group_admin()

main.py

@@ -442,6 +442,7 @@ If due to any reason you can not participate, please just change your "👍" rea
         unfulfillable_tasks = []
 
         while True:
+            self.assert_is_base_group_admin()
 
             sync_result = self.sync_members_as_active_users(session)
 
@@ -498,11 +499,24 @@ You have time to answer for {format_seconds(task.timeout)}."""
 
             await asyncio.sleep(1)
 
+    def assert_is_base_group_admin(self):
+        group_info_result = self.api.get_group(self.base_group)
+
+        if is_err(group_info_result):
+            print("Error, could not get info about base_group " + self.base_group + ": " + group_info_result.unwrap_err())
+            exit(1)
+
+        group_info = group_info_result.unwrap()
+        if config.number not in group_info.admins:
+            print("Error: Bot is not an admin of the base group.")
+            exit(1)
+
 
 async def main(config: Config, session: Session):
     api = SignalAPI(config.apiurl, config.number)
 
     bot = LabCleaningBot(api, config.lab_cleaning_signal_base_group)
+    bot.assert_is_base_group_admin()
 
     await asyncio.gather(
         bot.receiver(session),