I'v had a similar experience. The solution, for next time, is to clarify, in a letter of engagement, who the points of contacts are for all parties involved.
I would ask your government client to send an email to all users asking them not to email you directly and to provide them a POC.
Just my humble opinion
Everything makes sense in someone's mind
public class SystemCrasher :ICrashable
In addition, an integer field is not for irrational people
