docs: async def terminate_vm(self, preset, vm_id):
          """ Discard vm in specified preset
  
          :arg string preset: preset name
          :arg int vm_id: Virtual Machine id
          :return: 'OK'
  
          Sample response:
             ``OK``
          """
          vmshepherd = self.request.app.vmshepherd
          preset = vmshepherd.preset_manager.get_preset(preset)
          await preset.iaas.terminate_vm(vm_id)
          return 'OK'