title: How to auto submit otp after textfield filled in flutter or how how to auto trigger
body: <p><a href="https://i.stack.imgur.com/EEBHE.png" rel="nofollow noreferrer">PIncodetextfield</a></p>
  <p><a href="https://i.stack.imgur.com/Cxhc4.png" rel="nofollow noreferrer">Complete form code</a></p>