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,
        ]);
    }

}