NamelessMC

It is not clear what exactly does not work for you.  API or URL? Describe your problem in more detail, and yes, I wrote to you in your private messages, you do not answer

But there you can change your email, maybe it will work

This is not a file. And the table is in the database and you are unlikely to be able to change the password there, since it is encrypted there

Подскажите, как можно одним запросом к базе данных добавить несколько полей данных в таблицу?

https://www.spigotmc.org/resources/statz.25969/updates