title: Autovalidate of TextFormField is deprecated in Flutter
body: <p>'autovalidate' is deprecated and shouldn't be used. Use autoValidateMode parameter which provide more specific behaviour related to auto validation. This feature was deprecated after v1.19.0..
  Try replacing the use of the deprecated member with the replacement.
  <a href="https://i.stack.imgur.com/e24jK.png" rel="noreferrer">enter image description here</a></p>