CakeDC\Users\Model\Behavior\PasswordBehavior::resetToken PHP Method

    public function resetToken($reference, array $options = [])
    {
        if (empty($reference)) {
            throw new InvalidArgumentException(__d('CakeDC/Users', "Reference cannot be null"));
        }
        $expiration = Hash::get($options, 'expiration');
        if (empty($expiration)) {
            throw new InvalidArgumentException(__d('CakeDC/Users', "Token expiration cannot be empty"));
        }
        $user = $this->_getUser($reference);
        if (empty($user)) {
            throw new UserNotFoundException(__d('CakeDC/Users', "User not found"));
        }
        if (Hash::get($options, 'checkActive')) {
            if ($user->active) {
                throw new UserAlreadyActiveException(__d('CakeDC/Users', "User account already validated"));
            }
            $user->active = false;
            $user->activation_date = null;
        }
        if (Hash::get($options, 'ensureActive')) {
            if (!$user['active']) {
                throw new UserNotActiveException(__d('CakeDC/Users', "User not active"));
            }
        }
        $user->updateToken($expiration);
        $saveResult = $this->_table->save($user);
        $template = !empty($options['emailTemplate']) ? $options['emailTemplate'] : 'CakeDC/Users.reset_password';
        if (Hash::get($options, 'sendEmail')) {
            $this->Email->sendResetPasswordEmail($saveResult, null, $template);
        }
        return $saveResult;
    }