How to add a Reset to Defaults button with Settings API?

Add a new settings section for the reset button that is called on every tab. In the callback function for the field create the reset button. I would include the submit button here too to get both side by side.

In the validation function delete the whole option if the reset button is present in the request.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)