Problem connecting Hubs and Database, overwhelmed at the moment, community support greatly appreciated

[Julianunendlich]

Is there a database in the background of hubs that can be accessed? I have now installed MySql via npm, but I get this error when I try to connect - that is, when I put "var mysql = require('mysql');" in hubs.js.

Error from chokidar (C:): Error: EBUSY: resource busy or locked, lstat 'C:\hiberfil.sys'

Thank you in advance