[support] Database error on migrating site

[Mutuku Ndeti]

Hellos,

I moved a website from server A to B.

my db connection settings on server A were $db_url =
'mysqli://userold:passold@localhost/dbold'; and on the new server
$db_url = 'mysqli://usernew:passnew@localhost/dbnew';

I am getting a white "under maintenance screen" with error "The mysqli
error was: Access denied for user 'userold'@'localhost' (using
password: YES)."

There is no trace of userold in the settings.php file

what could be the problem?
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