ProfileForm.php

<?php

namespace Drupal\user;

use Drupal\Core\Form\FormStateInterface;

/**
 * Form handler for the profile forms.
 *
 * @internal
 */
class ProfileForm extends AccountForm {
  
  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $element = parent::actions($form, $form_state);
    // The user account being edited.
    $account = $this->entity;
    $element['delete']['#type'] = 'submit';
    $element['delete']['#value'] = $this->t('Cancel account');
    $element['delete']['#submit'] = [
      '::editCancelSubmit',
    ];
    $element['delete']['#access'] = $account->id() > 1 && $account->access('delete');
    return $element;
  }
  
  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    $account = $this->entity;
    $account->save();
    $form_state->setValue('uid', $account->id());
    $this->messenger()
      ->addStatus($this->t('The changes have been saved.'));
  }
  
  /**
   * Provides a submit handler for the 'Cancel account' button.
   */
  public function editCancelSubmit($form, FormStateInterface $form_state) {
    $destination = [];
    $query = $this->getRequest()->query;
    if ($query->has('destination')) {
      $destination = [
        'destination' => $query->get('destination'),
      ];
      $query->remove('destination');
    }
    // We redirect from user/%/edit to user/%/cancel to make the tabs disappear.
    $form_state->setRedirect('entity.user.cancel_form', [
      'user' => $this->entity
        ->id(),
    ], [
      'query' => $destination,
    ]);
  }

}