Neos\Neos\Domain\Service\UserService::getDefaultAuthenticationProviderName PHP Method

    public function getDefaultAuthenticationProviderName()
    {
        return $this->defaultAuthenticationProviderName;
    }

 /**
  * Prepares a table row for output with data of the given User
  *
  * @param User $user The user
  * @return array
  */
 protected function getTableRowForUser(User $user)
 {
     $roleNames = array();
     $accountIdentifiers = array();
     foreach ($user->getAccounts() as $account) {
         /** @var Account $account */
         $authenticationProviderName = $account->getAuthenticationProviderName();
         if ($authenticationProviderName !== $this->userService->getDefaultAuthenticationProviderName()) {
             $authenticationProviderLabel = ' (' . (isset($this->authenticationProviderSettings[$authenticationProviderName]['label']) ? $this->authenticationProviderSettings[$authenticationProviderName]['label'] : $authenticationProviderName) . ')';
         } else {
             $authenticationProviderLabel = '';
         }
         $accountIdentifiers[] = $account->getAccountIdentifier() . $authenticationProviderLabel;
         foreach ($account->getRoles() as $role) {
             /** @var Role $role */
             $roleNames[] = $role->getIdentifier();
         }
     }
     return array($user->getName()->getFullName(), $user->getPrimaryElectronicAddress(), implode(', ', $accountIdentifiers), implode(', ', $roleNames), $user->isActive() ? 'yes' : 'no');
 }