code: def get_subscriptions_channel(self, search_channel):
          
          data = self.get_clients()
          clients = []
          for client in data:
              if 'subscriptions' in client:
                  if isinstance(client['subscriptions'], list):
                      if search_channel in client['subscriptions']:
                          clients.append(client['name'])
                  else:
                      if search_channel == client['subscriptions']:
                          clients.append(client['name'])
          return clients
docs: Return all the nodes that are subscribed to the specified channel