code: def channel_to_id(slack, channel):
      
      channels = slack.api_call('channels.list').get('channels') or []
      groups = slack.api_call('groups.list').get('groups') or []
  
      if not channels and not groups:
          raise RuntimeError("Couldn't get channels and groups.")
  
      ids = [c['id'] for c in channels + groups if c['name'] == channel]
  
      if not ids:
          raise ValueError(f"Couldn't find #{channel}")
  
      return ids[0]
docs: Surely there's a better way to do this...