code: def kill_process(self, payload):
          
          # Kill specific processes, if `keys` is given in the payload
          kill_signal = signals[payload['signal'].lower()]
          kill_shell = payload.get('all', False)
          if payload.get('keys'):
              succeeded = []
              failed = []
              for key in payload.get('keys'):
                  success = self.process_handler.kill_process(key, kill_signal, kill_shell)
                  if success:
                      succeeded.append(str(key))
                  else:
                      failed.append(str(key))
  
              message = ''
              if len(succeeded) > 0:
                  message += "Signal '{}' sent to processes: {}.".format(payload['signal'], ', '.join(succeeded))
                  status = 'success'
              if len(failed) > 0:
                  message += '\nNo running process for keys: {}'.format(', '.join(failed))
                  status = 'error'
  
              answer = {'message': message.strip(), 'status': status}
  
          # Kill all processes and the daemon
          else:
              self.process_handler.kill_all(kill_signal, kill_shell)
              if kill_signal == signal.SIGINT or \
                 kill_signal == signal.SIGTERM or \
                 kill_signal == signal.SIGKILL:
                  self.paused = True
              answer = {'message': 'Signal send to all processes.',
                        'status': 'success'}
          return answer
docs: Pause the daemon and kill all processes or kill a specific process.