presto-plugin-toolkit/src/main/java/io/prestosql/plugin/base/security/FileBasedAccessControl.java/FileBasedAccessControl/checkCanCreateSchema
class FileBasedAccessControl:    @Override
    public void checkCanCreateSchema(ConnectorSecurityContext context, String schemaName)
    {
        if (!isSchemaOwner(context, schemaName)) {
            denyCreateSchema(schemaName);
        }
    }