Provides a confirmation form for cancelling user account.
Hierarchy
class \Drupal\Core\Form\FormBase implements ContainerInjectionInterface, FormInterface uses DependencySerializationTrait, LoggerChannelTrait, LinkGeneratorTrait, RedirectDestinationTrait, UrlGeneratorTrait, StringTranslationTraitclass \Drupal\Core\Entity\EntityForm implements EntityFormInterfaceclass \Drupal\Core\Entity\ContentEntityForm implements ContentEntityFormInterfaceclass \Drupal\Core\Entity\ContentEntityConfirmFormBase