code: def clients(self):
          
          clients = {}
          for k, v in self.connections.items():
              if hasattr(v.meta, 'client'):       # has boto3 resource
                  clients[k] = v.meta.client
              else:                               # no boto3 resource
                  clients[k] = v
          return clients
docs: Get all clients (with and without associated resources)