Access denied when creating a new Database

[ArazShilabin]

Hello there,

I have created a 'testContainer' using Mysql and .withDatabase("DB1").
But, I need to create another database in this same container
I establish a connection and run this query on the container.
CREATE DATABASE DB2

But get this error:
Access denied for user 'a1244555948106622bbaa4bdd0a84ced'@'%' to database 'DB2'

Is there a way to maybe create the DB2 in the initialization phase while creating DB1?
Or a way to use the root user, and grant my user permissions here with a query or something? (keep in mind I need access to the root to do this)
Or any other way around this?

Appreciate your help.

[ArazShilabin]

Oh, just realized I could make a connection and access root using:
createConnection ({ user : "root", password: testContainer.getRootPassword(), ... })