How to submit react-form-hook programmatically?

I'm trying to add a react-form-hook to my react.js project. The form is defined as:

<form onSubmit={handleSubmit(onSubmit)} ref={submitRef}>
          //some input elements
          <div className='d-flex justify-content-center' >
            <button
              type="submit"
              className=" btn btn-warning" >
              submit            
            </button>
          </div>
</form>

The onSubmit method is defined as:

const onSubmit = data => {
    console.log(data)
  };

I'm trying to define a timer (say 10 mins) and I want to trigger the onSubmit event of the form once the timer is expired. For this I used the react-timer-hook as follows:

const time = new Date();
  time.setSeconds(time.getSeconds() + 2);

  let submitRef = useRef()

  const {
    seconds,
    minutes,
    hours,
    days,
    isRunning,
    start,
    pause,
    resume,
    restart,
  } = useTimer({ time, onExpire: () => want to trigger the form submit event });

How should I define the onExpire property?