注册页面的firstname 与 lastName都是必填项。

有2种方法

1，把firstname 与 lastName改成非必填并隐藏起来

UPDATE `eav_attribute` SET `is_required` = ‘0’ WHERE `eav_attribute`.`attribute_id` = 5;
UPDATE `eav_attribute` SET `is_required` = ‘0’ WHERE `eav_attribute`.`attribute_id` = 7;

https://medium.com/medvine/magento-2-dont-require-first-name-last-name-on-registration-4ec5d4d21059

2，给firstname 与 lastName默认值并隐藏起来

getFirstname() == null){
            $customer->setFirstname('-');
        }
        if($customer->getLastname() == null){
            $customer->setLastname('-');
        }       
        return [$customer,$password,$redirectUrl];
    }
}

https://magento-qa.com/how-to-create-customer-without-firstname-and-lastname-in-magento-2-api