Mysql old and insecure pre-4.1 auth mechanism

[bonaccorsop]

I got this error once starting the import from an old MySQL database:
error: message=MySQL server is requesting the old and insecure pre-4.1 auth mechanism.
Upgrade the user password or use the {insecureAuth: true} option.

I wish to have a flag where set the insecureAuth option.

Tnx