[closed] What will I be giving away ?

I support a number of RTC/RQM repositories, some of which have been upgraded to 3.0.1. Customer has requested the XML ODBC configuration so they can attach Insight server to the RTC. I have some reluctance to hand over the "keys to the kingdom" so to speak, because somewhere in that file are credentials to at least an ID with DBADM authority.

authentication="dGRzY2FsbUB1cy5pZn0uY29tOlRDMG5jM3J0" authtype="2"

What is contained in that authentication (in general, not the specific example) ? Mostly looking to verify my concerns.